Thank you so much! I'm struggling in my physics course this summer because my teacher would rather add a thousand additional assignments than teach his subject 😢
I fucking love you man, you really are good, you helped me understand, when no one else could. Your videos are educational, and they make me want to learn, most often even sensational, they make my mind yearn. No more will I suffer to profs who made me distressful, i'll always remember your lessons and.. I hope that was helpful :D teaching me bio from high school all the way through university! thank you boss man
During finding the impulse of the car, shouldn't we take the summation of mass of both man and the car? Because the man is inside the car. And the mass of the man should affect the impulse.
Well not exactly. If you did try to find the impulse of the car and take account for the man inside the car, you would have to calculate how much of the man's impulse went before 0,072s. The truth is, this video is a very simplified way of calculating impulse. He assumes that the force is a constant, which it's not. If you quantified the force as a function, which it is, you would have to integrate it on time in order to calculate the total impulse.
no, because the time intervals were not the same. The person wasn't attached to the car and so his body resisted a change of momentum separately to that of the car.
wrong both car and human give impulse time intervals dont matter unless maybe if this time be very long like car and other car on 50m line than we have 2 force graph like 2 diffrent impact however still line work with some small force so not completely losee conection but we mayby can say thats was 2 impulse /impact due to two diffrent big peak in this case car with "person" person work on change oneforce shape we see as person work with full force somewhere around 70ms and car lose contact with target at araund 200ms person work force still be friction on seat ,seat belt etc in real also muscle tension there is also 2 ctd they just change shape of force graph in time let me explain you in this way = what push further 500kg bag empty 1000kg car at 50km/h with off gear and engine or 1000kg car + 5 man each 100kg at 50 km/h ? ... or try stop empty 50kg wagon from 20km/h vs with 100kg man on it ...
Your videos are a god send....thank you for explaining things in a simple, common sense way. Now I have a chance of passing Physics. I only wish I had found you sooner.
First of all, thanks for all the great videos! I watched the entire chem series (prior to the AP Chem test). Working my way through these for the SAT subject test on October 11. I was just curious as to whether or not there will be more AP Physics videos, and if there are, what would be the subjects of those? Also, are there any other study tools you'd recommend for physics to prepare for the subject test? Thanks again for the help! Really makes a difference.
Thank You so-so much!!! This year I took AP biology; your videos were extremely helpful. And this year, I will have AP Physics and AP chemistry. This video really helped me understand where the formulas come from (which is very important for me, since I do not like memorization). I wish you all the best! And thank you!
Mr anderson you are so awesome; i'm in an intro physics class in college and i'm using your videos haha just like in the days i used your AP Bio videos in high school x)
1:07 1. Which ball experiences the greater change in momentum? 2:00 2. Are the change in momentum and the impulse different? 2:50 3. How does the crumple zone in the Honda Civic make the car safer for the driver during a collision? 3:30 4. Copy the problem "Calculate the impulse and the force on both the car and the man". Write the given info 6:00 5. Pause the video, and solve the problem. When you're done, unpause, and check your answer :)
Here's one: The overall force affecting the system is 326N. The system steadily goes from 0 to 326N in 4,7 seconds, remains a constant 326N for 5,8 seconds and reduces steadily to 0N in 1,6 seconds. How do you calculate the overall impulse affecting the system? (Provided that the direction of the force doesn't change during all this.)
in class, we learned that if a bowling ball were to be hit by a rubber ball and a ball of putty, the rubber ball would be the one that topples it over. How does that work? From the rubber ball example, doesn't the ball that takes a longer time mean that it exerts a smaller force since there is a greater time?
Quick question here: I'd assume that when calculating the force/impulse onto the driver you'd have to add in the weight of the car as well, to get the full amount of force in the collision. Is this completely wrong and why? Thanks :)
In question was the fact you dropped similar objects with same mass and they hit the ground at different times so the force is different on each object which cuases a different time
Your videos are really good! They have helped me loads of the lasts few weeks. I am trying to apply the impulse-momentum relationship to the kinetic analysis of human gait but I don't understand the connection. Do you know how this is relevant in human gait?
Jonathan kicks a .45 kg soccer ball with a force of 12 N for .2 s. What is the impulse on the soccer ball? How fast was it moving after the .2 s if it started from rest? Can anyone please help me with this problem
Thank you, Thank you, so muchhhh for you time and effort :) I try to learn things with concept and your video opened my mind, from the core of my heart I appreciate your work !!
Wouldn't you need to add the masses of the car and the man when looking for the impulse of the car? After all, the TOTAL weight would be 1301 + 78 kg because the man is a part of that car's weight now, so to speak. When you're calculating for the impulse of the man himself (and only the man) then you would just calculate using 78 kg. Perhaps you have a reason as to why you only used 1301 instead of 1379 kg for the impulse of the car. Thanks!
only if man dont do diffrent movement terms off car ,but he do he do movement independently to the car ,when car stop crush on wall man still go forward so to calculate how much momentum and force he translate in to whole vehicle with man hit you need to count tension belts cushion etc ,or other word they translate its own weight in diffrent period of time more or less;) .
oh yea i do misteake probably momentum and impulse shpuld be biger like you write but force be diffrent due to diffrent in time movement so smaller force due to longer period of time when move be end be man but yea momentum and impulse is probabaly create be whole man and vehicle both .
so yea yea offcorse moemntum and impulse is results of weight car and man inside but because man deceleration slower force is lower if both be deceleratio in egzacly the same time so if he be permanently atatched to car ;) .
Not if you're trying to find the impulse of the man and the car separately. If you're trying to find the total impulse, then yes you add both masses ( I think so).
Hi Paul, first of all, I need to commend your effort in gathering the resources to put up a nice teaching video. However, this video clip is not without flaws. I find a few parts which require amendments. More importantly, impulse = average force x time. so the calculations only give average forces, but not revealing the actual varying force which could spike much higher within a short time.
When you are calculating the impulse of the car why didn't you add the mass of the car and man together? Shouldn't the man be essentially a part of the car?
Great video... Just one question: It seems to me this is calculating the average force exerted over the given time. How would you find what the maximum force exerted was (I assume it occurs about halfway through the time)? Thanks.
I GOT 30/30 IN OUR PHYSICS CLASSSSSSSSS!!!!!!!!!!!!!! +Bozeman Science thanks alot
Hooray!
The 68 dislikes are from jealous physic teachers.
85
@Gopinath Prem Kumar 90
Hahahaha😄😄😄
@@palmjuice5882 97
100 lol
These videos are absolutely fantastic. This is the best channel. Thanks for taking the time to make this video. Greatly appreciated
Thank you so much! I'm struggling in my physics course this summer because my teacher would rather add a thousand additional assignments than teach his subject 😢
my textbooks are full of jargon, but you make physics make sense!! thankyou!
I fucking love you man,
you really are good,
you helped me understand,
when no one else could.
Your videos are educational,
and they make me want to learn,
most often even sensational,
they make my mind yearn.
No more will I suffer to profs who made me distressful,
i'll always remember your lessons and..
I hope that was helpful :D
teaching me bio from high school all the way through university! thank you boss man
relax
Liked and subscribed. Thank you for a concise and straight forward explanation!
Can be frustrating when books make the basics too complicated.
During finding the impulse of the car, shouldn't we take the summation of mass of both man and the car? Because the man is inside the car. And the mass of the man should affect the impulse.
I think he was trying to find the impulse of the man and the car separately.
Well not exactly. If you did try to find the impulse of the car and take account for the man inside the car, you would have to calculate how much of the man's impulse went before 0,072s. The truth is, this video is a very simplified way of calculating impulse. He assumes that the force is a constant, which it's not. If you quantified the force as a function, which it is, you would have to integrate it on time in order to calculate the total impulse.
How about the boxing gloves, would you calculate the momentum of a hand and a boxing glove separately?
no, because the time intervals were not the same. The person wasn't attached to the car and so his body resisted a change of momentum separately to that of the car.
wrong both car and human give impulse time intervals dont matter unless maybe if this time be very long like car and other car on 50m line than we have 2 force graph like 2 diffrent impact however still line work with some small force so not completely losee conection but we mayby can say thats was 2 impulse /impact due to two diffrent big peak in this case car with "person" person work on change oneforce shape we see as person work with full force somewhere around 70ms and car lose contact with target at araund 200ms person work force still be friction on seat ,seat belt etc in real also muscle tension there is also 2 ctd they just change shape of force graph in time let me explain you in this way = what push further 500kg bag empty 1000kg car at 50km/h with off gear and engine or 1000kg car + 5 man each 100kg at 50 km/h ? ... or try stop empty 50kg wagon from 20km/h vs with 100kg man on it ...
Excellent, excellent, excellent... Very clearly explained and simplified to be broken down and practiced. Good stuff.
Your videos are a god send....thank you for explaining things in a simple, common sense way. Now I have a chance of passing Physics. I only wish I had found you sooner.
First of all, thanks for all the great videos! I watched the entire chem series (prior to the AP Chem test). Working my way through these for the SAT subject test on October 11. I was just curious as to whether or not there will be more AP Physics videos, and if there are, what would be the subjects of those? Also, are there any other study tools you'd recommend for physics to prepare for the subject test? Thanks again for the help! Really makes a difference.
🤣 2:52 'I'm seeing a slight pattern here, sir' LOVE IT.
SO HELPFUL THANK YOU!
and thank you for the laugh tonight!
Thank You so-so much!!! This year I took AP biology; your videos were extremely helpful. And this year, I will have AP Physics and AP chemistry. This video really helped me understand where the formulas come from (which is very important for me, since I do not like memorization). I wish you all the best! And thank you!
It was not simply helpful but very much helpful. Thanks for the video!😄😄
You are a true hero.
actually when you solve to figure out the force of the car you would need to account for the mass of the person, because that affects the car
I thought the same thing
though I finished my BE, I got the insight of the impulse now only. Thank you sir
Ah, but what happens when I crash a civic into a baseball player?
let's hope you have enough money for the hospital bill
@@jonathanfong9140 if i may suggest the time would be shorter and force would be greater and proportional to the hospital bill
this is fantastic. the car example made everything click
Thank you, I like the way you included the practical aspect.
Mr Anderson, you're a legend the video was really helpful 🤝, thank u
You are the greatest human to walk this earth
I am taking my MCAT in a while,and your video really help with physics section..
love your videos. To be in fact you're channel is the only place I go to understand physics :)
glad you mentioned significant figures
I love your videos!! You're a great teacher!!
Yes we all know
By the way my self SAFIN from India ...
Mr anderson you are so awesome; i'm in an intro physics class in college and i'm using your videos haha just like in the days i used your AP Bio videos in high school x)
1:07 1. Which ball experiences the greater change in momentum?
2:00 2. Are the change in momentum and the impulse different?
2:50 3. How does the crumple zone in the Honda Civic make the car safer for the driver during a collision?
3:30 4. Copy the problem "Calculate the impulse and the force on both the car and the man". Write the given info
6:00 5. Pause the video, and solve the problem. When you're done, unpause, and check your answer :)
Damn! Nice and simplified explanation
Thanks really helping with my homework :)
Just found out about this channel. Thank you!
I appreciate it sir for putting your valuable time for creating this video. I would like to thank you.
I really enjoy your playing !!
Nice lecture.
This is very easy to understand. Great video!
Thank you for making this video it has helped me.
This is really good help. Thank you, and yes, i have learned.
Thank you! this really helps!
Here's one:
The overall force affecting the system is 326N. The system steadily goes from 0 to 326N in 4,7 seconds, remains a constant 326N for 5,8 seconds and reduces steadily to 0N in 1,6 seconds. How do you calculate the overall impulse affecting the system? (Provided that the direction of the force doesn't change during all this.)
((0+326)/2)*4,7+326*5,8+((326-0)/2)*1,6 for a total of 2917.7 Newton seconds, just a year too late yolo.
in class, we learned that if a bowling ball were to be hit by a rubber ball and a ball of putty, the rubber ball would be the one that topples it over. How does that work? From the rubber ball example, doesn't the ball that takes a longer time mean that it exerts a smaller force since there is a greater time?
Thanks for using the metric system^^
Should the velocity be a negative value?
Yes velocity be a negative value because it's a vector quantity ... Got it ???
Quick question here: I'd assume that when calculating the force/impulse onto the driver you'd have to add in the weight of the car as well, to get the full amount of force in the collision. Is this completely wrong and why? Thanks :)
Excellent professor
i like your short intro music it's not annoying
In question was the fact you dropped similar objects with same mass and they hit the ground at different times so the force is different on each object which cuases a different time
Your videos are really good! They have helped me loads of the lasts few weeks. I am trying to apply the impulse-momentum relationship to the kinetic analysis of human gait but I don't understand the connection. Do you know how this is relevant in human gait?
Thank you so much!! It was so well explained
Jonathan kicks a .45 kg soccer ball with a force of 12 N for .2 s.
What is the impulse on the soccer ball?
How fast was it moving after the .2 s if it started from rest?
Can anyone please help me with this problem
Give this man cookie jar!!!
Thank you, Thank you, so muchhhh for you time and effort :) I try to learn things with concept and your video opened my mind, from the core of my heart I appreciate
your work !!
Thank you so much this has been such a help! :D
Very Helpful. Thank You very much ! :)
I luv u sir ...thanks for sharing your knowledge... your videos are clear and effective... thanks a lot....someday I will take it place
Could you explain the impulsive torque and the meshing of two gears as an example ? 😞
Thank you so much Sir. It really helps a lot in my studies. God Bless.
Thank You
Hey emilymae
@ 7:02 he meant to say If we want to figure out the Force*. Nonetheless still a great explanation of Impulse!
Doesn't change in velocity have to be negative for this one
Ikr
Thanks Paul
you are extremely helpful thank you for this video
Wouldn't you need to add the masses of the car and the man when looking for the impulse of the car? After all, the TOTAL weight would be 1301 + 78 kg because the man is a part of that car's weight now, so to speak.
When you're calculating for the impulse of the man himself (and only the man) then you would just calculate using 78 kg.
Perhaps you have a reason as to why you only used 1301 instead of 1379 kg for the impulse of the car.
Thanks!
physics usually likes to create "perfect" impossible scenarious
only if man dont do diffrent movement terms off car ,but he do he do movement independently to the car ,when car stop crush on wall man still go forward so to calculate how much momentum and force he translate in to whole vehicle with man hit you need to count tension belts cushion etc ,or other word they translate its own weight in diffrent period of time more or less;) .
oh yea i do misteake probably momentum and impulse shpuld be biger like you write but force be diffrent due to diffrent in time movement so smaller force due to longer period of time when move be end be man but yea momentum and impulse is probabaly create be whole man and vehicle both .
so yea yea offcorse moemntum and impulse is results of weight car and man inside but because man deceleration slower force is lower if both be deceleratio in egzacly the same time so if he be permanently atatched to car ;) .
and that just average force .
Shouldn't we add the mass of the person to the mass of the car when determining impulse?
Not if you're trying to find the impulse of the man and the car separately. If you're trying to find the total impulse, then yes you add both masses ( I think so).
excellent . I wish you were my tution teacher :)
(stopped at 2:48) now I am curious about ballistics and the affects of surface area and etc....
thank you for the help.
You helped me get intuition ....
that jawline!!!!!!!!!!!!!!! anyway back to physics
mrs mendes You need to relax Mrs. Mendez, you’re a bit horny.
Thank you so much!
It was very helpful
thanks, it helped me alot
thanks for sharing your knowledge
Good explanation
Thanks
Thank you. One question: Would you add the weight of the passenger to get the total weight of the car for this experiment? If no, why not?
Sir huge fan of ur videos! I wish I can do similar efforts. Sir, please suggest me hardware and software u use! Will be great help.
Would the mass of the car not be the mass of the man plus the mass of the car since he's sitting in it?
When he got the impulse of the car he did Fxt= F=m x a which means 1301 x 10m/s^2 so why did he just leave the mass of the car untouched
excellent sir
Thank you ever much .
Thank you sir
You are my life saver !!!!!!!
very clear and interesting...and so helpful thnq
Very well explained.
Hi Paul, first of all, I need to commend your effort in gathering the resources to put up a nice teaching video. However, this video clip is not without flaws. I find a few parts which require amendments. More importantly, impulse = average force x time. so the calculations only give average forces, but not revealing the actual varying force which could spike much higher within a short time.
how tan?? Jk it was just to teach the method to solve a given problem on impulse
Should t in your equation be delta t? I think of t as instantaneous time and delta t as change in time like delta V is change in velocity.
+Ian Tierney Yeah, I think you're right. It should be delta t.
very good
mr andersen
while calculating the cars impulse .shouldnt we add the mass of the man inside the car..bcz tht person is also carrying sm 78 kgs
looking good!!
When you are calculating the impulse of the car why didn't you add the mass of the car and man together? Shouldn't the man be essentially a part of the car?
20295.6/0.72=28188.33, not 281883.3
Aside from that, I understood the concept much better now, big thanks !
the time is 0.072s not 0.72s
get fucked
Of course that was helpful.
Thanks man you're better than my Professor ;p
great videos! thanks you so much
thank you so much, YOU are a great teacher
Very Helpul
Should the mass of the car be 1379kg since the man is inside at the time of impact?
Great video... Just one question: It seems to me this is calculating the average force exerted over the given time. How would you find what the maximum force exerted was (I assume it occurs about halfway through the time)? Thanks.
Very helpful!
Thanks sir ❤❤