Yes, the net torque of the system is indeed zero.
I think the torque about the point of contact is non-zero for the system consisting of the sphere only, as per the following argument. Correct me if I am wrong.
Consider only the sphere at the instant of collision, the forces are:
(1) Normal...
I think you have to consider the torque about the point of contact of the sphere with the surface because pure rolling can be viewed as pure rotation about the point of contact. During the collision, the normal force exerted by the wall on the sphere will produce a non-zero torque about the...
Homework Statement
A particle of mass M moves on the X-axis as follows: It starts from rest at t = 0 from the point x = 0 and comes to rest at t = 1 at the point x = 1. No other information is available about it smotion at intermediate times (0 < t < 1). If α denotes the instantaneous...
Can someone give me examples of the following two situations and clarify each situation?
-An object is stationary but the point of application of the force moves on the object.
-An object moves in such a way that the point of application of the force remains fixed.
Moreover, what can one say...
I have two questions:
1) Is it in general assumed that the parallel plates of a capacitor are fixed to some surface or is there a force that counteracts the attractive force between the plates whenever one considers a typical problem involving capacitors?
2) Consider a dielectric of length L...