Physics Ninja solves 16 problems - 46 questions relating to the work-energy theorem and conservation of energy. Download the problem set: drive.google.c...
After failing physics multiple times, I just got the results back from my Physics retake exam and I got a 9.3/10! Your videos have been incredibly helpful. So truly, many thanks for doing what you do!
1. For problem 3, why can those two areas cancel out each other when work is a scalar quantity? 2. Problem 6, since force that's being applied to the sled is provided, why can't you just multiply that to the distance traveled? And if there's a force being applied, the velocity is not constant throughout A to B, why are we using the Kinetic energy?
hello Sir in problem 8, isn't the work equal to the force multiplied by the distance so why did you take the variation of the kinetic energy instead of multiplying the force by the distance...
Hi! I have a request for you. Could you make a video about the following problem? I don't know how to do it with either the Lagrangian or Newtonian mechanics, and I've not seen a solution to this problem online. A disk with mass M and radius R is rolling down an inclined plane that makes an angle θ with the horizontal, without slipping. A block with mass m is attached to the disk via a massless rope and a massless/frictionless pulley in such a way, that the rope will wrap around the disk when the disk rolls down the incline, and the mass will move up (i.e. it is initially attached tangentially to the top of the disk). What is the acceleration of the block? I know the key to this problem is that the block will have an additional acceleration because the rope wraps around the disk, having an extra α*R term for acceleration. But no mention has been made of the constant rolling friction force, and I don't know how to solve the problem without this. The friction force should be the force that gives the disk a net torque in the clockwise direction (that is down the slope). Also, I don't how to incorporate the wrapping around the disk into the equations for the Lagrangiang (I do if the rope was attached to the center of the disk). P.S. You're channel is one of the best physics channels ever! Keep up the great work!
The fact this was uploaded exactly a week before my test on this is crazy
Same 😭
Same 😏
After failing physics multiple times, I just got the results back from my Physics retake exam and I got a 9.3/10! Your videos have been incredibly helpful. So truly, many thanks for doing what you do!
1. For problem 3, why can those two areas cancel out each other when work is a scalar quantity?
2. Problem 6, since force that's being applied to the sled is provided, why can't you just multiply that to the distance traveled? And if there's a force being applied, the velocity is not constant throughout A to B, why are we using the Kinetic energy?
Love your videos, I bought your courses and they’ve been helping me a lot
Sir can you please do linear momentum, collisions, and impulse problems next?
Check back in a few days
The energetic delivery renews my drive to learn! Cool!
Thanks for this review.
hello Sir in problem 8, isn't the work equal to the force multiplied by the distance so why did you take the variation of the kinetic energy instead of multiplying the force by the distance...
_The timing could have never been any perfect..._
Hi, would you be posting more review sessions with the topics for the upcoming ap physics 1 exam? Your videos have helped in studying.
Hi! I have a request for you. Could you make a video about the following problem? I don't know how to do it with either the Lagrangian or Newtonian mechanics, and I've not seen a solution to this problem online.
A disk with mass M and radius R is rolling down an inclined plane that makes an angle θ with the horizontal, without slipping. A block with mass m is attached to the disk via a massless rope and a massless/frictionless pulley in such a way, that the rope will wrap around the disk when the disk rolls down the incline, and the mass will move up (i.e. it is initially attached tangentially to the top of the disk).
What is the acceleration of the block?
I know the key to this problem is that the block will have an additional acceleration because the rope wraps around the disk, having an extra α*R term for acceleration. But no mention has been made of the constant rolling friction force, and I don't know how to solve the problem without this. The friction force should be the force that gives the disk a net torque in the clockwise direction (that is down the slope). Also, I don't how to incorporate the wrapping around the disk into the equations for the Lagrangiang (I do if the rope was attached to the center of the disk).
P.S. You're channel is one of the best physics channels ever! Keep up the great work!
shouldn’t work done by gravity be negative for Problem 11 question 20? Why did you say it was positive?
Doesn't kinetic friction take away from work done by kinetic energy not gravitational potential energy?
Hi can you please make video to review physical 2 for the book serway from chapter 23 to 30 ?
Sir from which book I should study physics for advanced
❤ from india
sir how did you get 115 degree in problem 10
good review for energy problems👍
Thanks 👍
Sir , rain man problem.
I ike the way he says JJJJOULES
Glad to see you are studying