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A pendulum bob, with mass 1.60 kg, is held at rest initially in a horizontal position...

A pendulum bob, with mass 1.60 kg, is held at rest initially in a horizontal position as shown. The string has negligible mass and a length of 1.20 m. The bob is then released from rest. It swings down and collides with a block of mass 2.40 kg initially at rest. Ignore air resistance.

a) Use the Principle of Conservation of Mechanical Energy to find the speed of the pendulum bob just before the collision.

b) (The bob collides with the block. The bob recoils with a speed of 0.100 m/s. What is the speed of the block just after the collision?

c) Is the collision elastic or inelastic? You must show how you arrived at your conclusion (i.e. show all work).

d) \The block is displaced a total of 2.00 m to the right after the collision. Use the WorkEnergy Theorem to find the coefficient of kinetic friction between the block and surface.

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