physics

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two different masses have equal, non zero kinetic energies. the momentum of the smaller mass is?

what is the magnitude of momentum of a 0.140 baseball traveling at 45.0m/s?

a 2.00g bullet hits and becomes embedded in 5.00 kg wood block which is hanging from a 1.60m long string. this causes the block to swing through an arc of 5.50(degrees). what was the speed of the bulletbefore it hit the block ?

a 14000kg boxcar is coasting at 1.50m/d along a horizontal track when it hits and couples with a stationary 10000kg boxcar. what is the speed of the cars after the collision?

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