Question 1
Consider the following system:
Two spherical masses, A and B, are attached to the end of a rigid rod with length l. The rod is attached to a fixed point,p, which is at the midpoint between the masses and is at a height, h, above the ground. The rod spins around the fixed point in a vertical circle that is traced in grey. 
The rod is spinning and mass B has an instantaneous linear velocity of 
Explanation: We only need to know the equation for linear kinetic energy to solve this problem:
In the problem statement, we were told that the instantaneous velocity of mass B was 
. Since both masses are attached to a rigid rod and spinning in a uniform circle, we know that:
Plugging this into our original equation, we get:
In the problem statement, we were told that the instantaneous velocity of mass B was . Since both masses are attached to a rigid rod and spinning in a uniform circle, we know that:
Plugging this into our original equation, we get: