GCSE Physics Revision "Resultant Forces"
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- Опубликовано: 12 сен 2024
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In this video, we look at what is meant by a resultant force. We then learn how to calculate resultant forces acting parallel to each other. Finally, we look at free-body diagrams.
This video is based on the AQA spec. If you are following a different exam board then you should check your specification. The Amazon link above is an affiliate link. This provides a small commission which helps to support freesciencelessons. The cost remains the same to you. If you prefer not to use this, you can search Amazon for the Freesciencelessons workbooks.
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My teacher took over 5 weeks to teach us what a resultant force and to be honest... I didn’t understand one single bit. This guy taught me everything my teacher told me in less than 5 minute. Respect to this legend. I really hope that you can come and teach my school.
ayyy a Korean guy doing gcses!! XD
Wouldn't we all love him teaching at our school :D
tomorrow is the last day of gcse. i just wanted to say how thankful i am for what you did to me. in the past 2 years, due to havong an attention span of a goldfish i never understoo danything. but you saved me and my gcse, thankyou very much, i am confident that i will do the courses i wan tin alevel all because of you!
what did u get in science
bruh my teacher couldn't even sum this up in an hour and this guy did it in 4 mintues
True
same
In it
fax bro
Fr
Our teacher teaches us this in 1 hour u teach in like less than 5 minutes
Such a legend🙏👏🤙😜👍🙌👏🤛🤘🤝🙏🙏🙏🙏🙏🙏🙏😺👐😽
Lmfao chill with the emojis
@@idk-tr3oq what do u expect his a fortnite kid
Woah u must be my past self
Same
Why does his voice seem so much more soothing than normal... Makes me sleepy 💤💤
stay strong kid gcse grinddd
@@ompatel4630 too stressful but Dr Donnelly makes it easy
Perfectly balanced, as all things should be.
XD
*cough cough* thanos
XD
Lmao
Just like chemical equations lol
You are the reason my class will pass our Biology and Physics GCSEs, thank you so much
Glad i found this channel. The videos are so short and well explained. I will use these for my studying from now on
Thank you! These lessons are such life savers
I've had three lessons on Resultant Forces and have been stuck on it. Four minutes is what made me understand. Why can't teachers be like this at my sch???
good luck to all the future years having to memorise 35 equations.
I have a test on Monday. I didn't really understand what a Resultant force means, but thanks to you, I bet that I'll get an A+, All thanks to you!!!
crying rn cuz i have a science test tmr and i didnt know what the hell resultant forces were, but thanks to this guy i’ll prob ace the test
such a legend
Thank you for your videos with the speaker clearly facing the camera, and the words on the screen. Very helpful to all - necessary for some.
Understand the video then go into the comments and get confused😂
stick with the video, forces is often taught badly, this guy does a good job!
ALL HAIL "FREE SCIENCE LESSONS"!!!!!!
This dude a better teacher than anyone
dude thanks soooooooooooooooooooooooooo much, this was such a bullshit thing i was taught, no explaining, no videos, just throw into it to figure it out, this helps a lot, u earned a sub
1 hour lessons this legend dose them in 5 mins
Love your vids bro carry on your saving my GCSEs xx
Will yo do required practical vids
Every required practical will have a vid (and I've done most of them already).
Legend
OMG! HERO😭 YOU EXPLAINED IT REALLY REALLY WELL👍🏿 THANK YOU
This guy is a legend
he is really the GOAT
When Eminem becomes a scientist
when will the paper 2 revsion booklets be available for biology,chemistry and physics?? hopefully before may 2020......
Thank you! This was a great help :) 👏
you are getting me through quarantine
thank you very much sir, you are so helpful and very clear in your videos.
You know, I wish he could be replaced with all my science teachers in my school so my lessons will be shorter
Me toooo
if the resultant force on the skydiver is 0, would that mean he isn't moving? your videos are so helpful thank you
No, it would mean that he is no longer accelerating. Instead the skydiver has reached terminal velocity and is moving at a constant velocity.
no it could mean he is travelling at a constant velocity
it means that he's travelling at constant speed :)
no, it just means he keeps moving at a constant speed and doesn’t accelerate or decelerate (i think) x
If there's no overall resultant force, Newton's First Law is applied, which means the diver would keep moving with no acceleration or deceleration. If the diver wasn't moving to begin with and the resultant force is zero, then yeah he would remain stationary - not moving.
( I think - )
I actually like his videos
Hello, just a quick question. The man with parachute example has a resultant force of zero, I can agree with that but a man free falling is mobile so there are forces acting upon it so the resultant force would not be zero. If resultant forces are zero then the object is stationary. Maybe if you could, next time try using anonther analogy when it comes to balanced resultant forces. No hate, how could I?!
:)
Hi and thanks for the message. I'm afraid that you are making a bit of a mistake there. A moving object does not need an unbalanced force to keep moving (which is against what seems logical). An unbalanced force only causes an object to accelerate. So in the case of the skydiver, when the forces of weight and upthrust are balanced (ie terminal velocity), the skydiver moves at a constant velocity even though there is no resultant force acting. I hope that helps.
@@Freesciencelessons Well said! :)
So is this everything for paper 2 because there are barely any videos about electricity so I'm worried we are missing some videos in this playlist.
Edit: electricity is in the other paper 🤦
do we need to know the last part of the video properly?? great video!!!
if this guy taught in public schools he would finish the syllabus in 2 weeks
😭💀
If the forces are balanced why is the skydiver still in motion?
Unbalanced forces do not cause motion. They cause acceleration. So the skydiver is moving but not accelerating.
Freesciencelessons Thank you it’s completely clear to me now
Sir if an object is travelling at constant velocity, isn't the forward force greater than friction forces? And this would allow the object to travel at a constant velocity?
Because if the forces acting opposite to each other are equal, wouldn't the object be suspended in a position?
No that's a very common misconception. An object does not need a force to be acting on it for it to be moving. A resultant force only causes an object to accelerate (changing speed, direction or both).
This man doesn't yap like my teachers
Our 2h lessons could be 2 minutes
i would’ve thought the thrust would be longer on the plane.. thanks for teaching me
legend
what exam board are your videos based on?
They're based on AQA but apply to other exam boards in most cases.
When will the revision workbook be available?
Have u got a video on the first required practical for biology?
is it just examples of forces that we need to know??
If the aeroplane is travelling at a constant velocity, it has an overall forward thrust, so why are the forces balanced if the aeroplane is going forwards?
Traveling at a constant velocity does not need thrust. Thrust causes acceleration. When anything is traveling at constant velocity, the resultant force acting on it is zero
Got it within 3 mins with it help thanks
Do we need to know laws such as newtons thirds law?
Kashaf Syed yeah, I think so
My teacher said yeah
I had to
I don't understand..wouldn't you expect the thrust to be bigger than the drag force if the plane is moving forwards??
İ learned more than i did in a hole school day in 5 mins jeez 😆
I'm glad that you found the video useful.
Thanks great video
What does it mean in physics where it states"When 2 objects interact"?
It means either touch or apply a force to each other (eg for non-contact forces).
2:34 sooo is the guy still going down or is he staying still in air the air
You do not need a resultant force to move so he is definitely moving towards the Earth. A resultant force causes a change in velocity.
Freesciencelessons so when there is no resultant force it means that it is at a constant velocity
Yes that's correct.
your so peng my yung drilla
@@user-wy4hs2kt6f LOOOOOOL
What forces are acting upon a ladder which is leaning against a wall?
What causes lift?
So the sky-diver just sits hanging in the sky?
If forces are equal, the object will move at a constant pace.
Do you still have the old spec flashcards if so, can you send a link please?
hey there. so you know how there are 4 forces for an object flying in the air . as said in the video if the air resistance is the same as the thrust then it is at a constant velocity , but when there is more weight than lift or vice versa does that mean the object is ascending or descending (changing altitude)
thank you so much gang last science exam tomorrow might not fail now
is lift the same as normal reaction?
whos doing last min revision for mocks
To be honest most the times it’s not the teacher but the students my teacher is actually good it’s just me who needs a recap
Will the revision workbook be done for current year 11s?
I'm really sorry but I'm afraid not. I still haven't even done Biology 2 so I need to get those done. They'll be done by the end of May.
Freesciencelessons ah ok thank you for all your effort you put into making these videos!
thx I understand, I have a question. How do you know if its going to the left or the right? (the resultant force)
Look for the direction where the force is greater. That will be the direction of the resultant force. For example if we have 10N acting to the right and 20N acting to the left, then the resultant force will be to the left.
Very good thanks
Nice car
THANK YOU I THINK I'M SLOWLY GETTING GOOD GRADES BC OF U
How can an aeroplane fly if the resultant force is 0 Newtons?
Because unbalanced forces only change the speed or direction of an object. You do not need a force to move. I'll be covering all of that in a video soon.
Freesciencelessons Ok thanks Sir! Are you Newcastle United football fan?
thank you!
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i like this dude
Cheers.
Helped me a lot
Plz also introduce cie class as well
If something was traveling in space surely there's no resistance so the resultant force would always be acting so it would never stop accelerating. But does anything stop the acceleration?
Inertia my friend, newtons first law
Thank you Sir!
so the skydiver is just hovering and not moving up or down?
It is moving but at a constant speed meaning it's not accelerating or decelerating.
yes ladsss
hi
hi
is it normal for me a year 7 to do gsce work :///
I think it's good that you are starting early But don't overwork yourself. 😄
Thank you.
www.thepetitionsite.com/en-gb/855/217/799/give-shaun-donnelly-freesciencelessons-a-knighthood/
www.thepetitionsite.com/en-gb/855/217/799/give-shaun-donnelly-freesciencelessons-a-knighthood/
Do we need to know these examples?
Not the specifics. But you should know the basic forces acting on an object (weight, air resistance etc.)
@@nasranakosar4784 ok smarty pants
thank you sir
No problem
Sir, I came across a practice question which asked for the resultant force, but the two forces were at an angle of 30°, do I need to know how to do this?
2D Gorillaz pythag or trig dude
I thought resultant force is mass x acceleration , why are u subtracting.
I can see where you get that from (F=ma) but in this case, we already know both forces. We're just calculating the overall (resultant) force so we need to subtract since they are acting in opposite directions.
great viddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddd
Legend👍🏾👍🏾👍🏾
How do you know if the resultant force is left or right?
Well the arrows show the direction of the force. Also the ur right and left hand tell u if the force is right or left. Like a compass
East is right and west is left
If the larger force is to the right then the resultant force is right obviously
I love this guy😍😍🤤
for the car example why is the resultant force acting to the left and not the right
Because the force on the left is bigger than the force on the right so when we subtract both forces a 1000N is still left for the force on the left.
I learned more from you than in my class, btw is it just me or he looks like grand moff tarkin? XDXD
Good evening fellow students 👍🏻
Good luck tomorrow
this man is also new sir Isaac newton
nice mate
Good video
Good luck on your exam tomorrow boys
UR SO CUTEEEE
1:59 what about weight?
You know its that time of year when the views start spiking up... Y10 Mocks anyone?
i wish my teacher could teach me like this!
Hi new friend here, thanks for sharing, please stay connected. God bless
thank you