Hey Prof! I've been following your channel since when I was in 10th grade. Now I'm doing my Engineering course and still its relevant to the topic. Thanks for making phy fun!
Very straight forward and helpful. The concepts shown in this video are demonstrated and executed greatly while the problem itself is simple to follow.
well there's a card that links to Newton's laws, but other than that i'm sure you can find whatever you need on my home page, it's organized immaculately. just snoop around a little! trigonometry is coming soon.
Good day Mr professor Dave all I want to know physical sciencs, maths, life and master this subject am working as a security officer at the moment next year I'm going back to school rewrite my matric and busy saving money so I will at least have a balance when it comes to financial support I have seen that I real have the potential to master this subject what you are doing is more than what you can image to world and bring to change to mindset to mellions when it comes to this subject you are really make a very new world of knowledge, wisdom, power, thank very much you change my life and mindset
Good Video. I would resist the talk about the tension forces, as you gave two different values for the tension and both were wrong. I would stress that you solve this like a tug-of-War, and subtract the pulling forces to get the net force acting on the system (Two-Body). Your net force of 13.6 Newtons is correct. The Tension in the rope is 15.6 N acting on both objects of the system. The acceleration of the system is 2.83 m/s/s [down slope for object A/ UP for object B]
Net force divided by total mass. Newton's 2nd Law: acceleration is force divided by mass. For the whole system then, it is total force (net force) divided by total mass.
Yes! If the pulley and rope have no mass then the tensions are equal. That is the usual assumption for introductory problems like this as for a pulley with mass comparable to mass A and mass B you would have to use torque and angular acceleration to understand the motion. It looks like the short answer is P. Dave made a mistake. The tensions not being equal violates Newton's 3rd Law and leads to contradictions and nonsense results (Again, IF the mass of the pulley is zero). For example if the tension on mass B was in fact 26.3 N then using Newton's 2nd Law on mass B would tell you it is accelerating upward at 10.5 meters per second squared. This makes no sense: this system cannot accelerate at a rate greater than g. The claims of the video would also result in two masses accelerating at different rates which is not true. For a zero mass pulley and rope, the tensions are equal and will work out to 16.4 Newtons. The acceleration of both masses will be 2.82 meters per second squared.
Don't worry about it too much as the statement about tensions is incorrect in this video. The tensions (for the simple case of a pulley and rope with no or very small mass) should be equal. To see how tensions properly fit in you may wish to find another example of this type. In this video prof. Dave is mistaken.
Hey Prof!
I've been following your channel since when I was in 10th grade. Now I'm doing my Engineering course and still its relevant to the topic.
Thanks for making phy fun!
Very straight forward and helpful. The concepts shown in this video are demonstrated and executed greatly while the problem itself is simple to follow.
This was my favourite practice problem so far
Another great video to add to your collection
Sir....u are great........ Take love from Bangladesh ❤️❤️
Me also budy.
It would be nice to have links to the three tutorials mentioned in this video.
well there's a card that links to Newton's laws, but other than that i'm sure you can find whatever you need on my home page, it's organized immaculately. just snoop around a little! trigonometry is coming soon.
Good day Mr professor Dave all I want to know physical sciencs, maths, life and master this subject am working as a security officer at the moment next year I'm going back to school rewrite my matric and busy saving money so I will at least have a balance when it comes to financial support I have seen that I real have the potential to master this subject what you are doing is more than what you can image to world and bring to change to mindset to mellions when it comes to this subject you are really make a very new world of knowledge, wisdom, power, thank very much you change my life and mindset
good luck my man you can DO IT!!!!!!
Good Video. I would resist the talk about the tension forces, as you gave two different values for the tension and both were wrong. I would stress that you solve this like a tug-of-War, and subtract the pulling forces to get the net force acting on the system (Two-Body). Your net force of 13.6 Newtons is correct. The Tension in the rope is 15.6 N acting on both objects of the system. The acceleration of the system is 2.83 m/s/s [down slope for object A/ UP for object B]
if asked about the acceleration would you divide the force by the total mass or just by the mass of block A?
Net force divided by total mass. Newton's 2nd Law: acceleration is force divided by mass. For the whole system then, it is total force (net force) divided by total mass.
Sir what about force due to friction??
Why did you not consider it in this problem??
i said that the block is frictionless.
Sir if friction acts here then will it added or subtracted by the resultant force??
friction on block A would be subtracted from the net force as it operates in the opposite direction of the net force.
Is there a playlist of this video? A whole bunch of problems like this?
yep classical physics practice problems, at the top of the home page!
mgx= 34.3cos50 not 34.4sin50, please correct me if i'm wrong.
no, the clip is correct.
I am sure you are wrong.
is the acceleration 0.918 mls^2??
Sir your video helps me a Iot. Tnx sir😃
What about its friction ?
if you let go, wouldn't block on ramp have frictional force as well
Is this a simple pulley? I thought that the T is the same in all points of the rope.
Yes! If the pulley and rope have no mass then the tensions are equal. That is the usual assumption for introductory problems like this as for a pulley with mass comparable to mass A and mass B you would have to use torque and angular acceleration to understand the motion.
It looks like the short answer is P. Dave made a mistake. The tensions not being equal violates Newton's 3rd Law and leads to contradictions and nonsense results (Again, IF the mass of the pulley is zero). For example if the tension on mass B was in fact 26.3 N then using Newton's 2nd Law on mass B would tell you it is accelerating upward at 10.5 meters per second squared. This makes no sense: this system cannot accelerate at a rate greater than g. The claims of the video would also result in two masses accelerating at different rates which is not true.
For a zero mass pulley and rope, the tensions are equal and will work out to 16.4 Newtons. The acceleration of both masses will be 2.82 meters per second squared.
Omg thank you so much!!!!!
Omg I finally understand omg😮
I need to know the acceleration of the system
finally a question that i can solve
will goes block A
I really don't get the significance of tension in this question
Don't worry about it too much as the statement about tensions is incorrect in this video. The tensions (for the simple case of a pulley and rope with no or very small mass) should be equal. To see how tensions properly fit in you may wish to find another example of this type. In this video prof. Dave is mistaken.
Wow .....
this made no sense :(
why we assume trig angle is equals to the angle of the ramp 50 degrees?