Who can help me with these Dynamics questions 1 If e1 then

Who can help me with these Dynamics questions ?

1- If e=1, then:?

2- A cart in an amusement park is pulled towards the center by a force F. Is angular momentum conserved for the cart about the center O ?

01. Its a plastic impact 2. Its an elastic impact O 3. Energy is not conserved before and after the collision O 4. Energy is conserved before and after the collision

Solution

1. it is an elastic impact The coefficient of restitution e for a perfectly elastic collision is 1, which means that total energy is conserved or no energy is lost as heat or work done in deforming the object.

2. Yes. The radius of rotation always remain costant. Therefore the angular velocity will be constant. The angular momemtum is given by L= IW, where I-moment of inertia and W= angular velocity.