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Ethan, whose mass is 80 kgkg, stands at one end of a very long, stationary wheeled...


Ethan, whose mass is 80 kgkg, stands at one end of a very long, stationary wheeled cart that has a mass of 260 kgkg. He then starts sprinting toward the other end of the cart. He soon reaches his top speed of 8.0 m/sm/s, measured relative to the cart.

What is the cart’s speed when Ethan reaches top speed?


A 2.0 kgkg block of wood sits on a frictionless table. A 3.0 gg bullet, fired horizontally at a speed of 520 m/sm/s , goes completely through the block, emerging at a speed of 200 m/sm/s

What is the speed of the block immediately after the bullet exits?

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