1 a bullet of mass m 800g is fired into a block of mass m, Ask an Expert

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1) a bullet of mass (m= 8.00g) is fired into a block of mass M =190 g that is initally at rest at the edge of a table of height h =1.00 m. The bullet remains in the block, and after the impact the block lands d= 2.30 m from the bottom of the table.

Determine the initial speed of the bullet.

__________m/s (answer)

2) A railroad car of mass 3.0x10^4 kg moving at 4.00 m/s collides and couples with two coupled railroad cars, each of the same mass as the single car and moving in the same direction at 1.20 m/s.

A) what is the speed of the three coupled cars after the collision?

_______ m/s (answer)

B) How much kinetic energy is lost in the collision?

_________J (answer)

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