A 3.9 kg block of wood sits on a frictionless table. A 3.0 g bullet, fired...

A 3.9 kg block of wood sits on a frictionless table. A 3.0 g bullet, fired horizontally at a speed of 430 m/s , goes completely through the block, emerging at a speed of 200 m/s .

Part A:

Consider a system of both objects. Is momentum conserved in this situation? Explain.

Part B:

For the same system of both objects, is kinetic energy conserved? Explain.

Part C:

What is the speed of the block immediately after the bullet exits? (Note: Just give your final answer here; show your work in Part D.)

Part D:

Suppose that you had a system of just the block, instead of the system that you used in the previous parts. Explain how this would change your approach to parts (B) and (C).

Part E: Suppose that the bullet had instead glanced off the side of the block, so that the bullet ended up going in a direction 30^o to one side of its initial trajectory. (For example, if the bullet was initially going east, it ended up going 30^o north of east.) Explain how that would change your approach to Parts (B) and (C).

Solutions

Expert Solution

genius_generous answered 1 year ago

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