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1. A o.5 kg stone moving at 4m/s overtakes a 4kg lump of clay moving at...

1. A o.5 kg stone moving at 4m/s overtakes a 4kg lump of clay moving at 1m/s. The stone becomes embedded in the clay.

A) What is the speed of the composite bodyafter the collision?

B) How much kinetic energy was lost?

2. Three balls are thrown simultaneously at the same speed from a roof. Ball A is thrown vertically upward, ball B is thrown horizontally, ball C is thrown vertically downward.

A) Do the balls reach the ground at the same time?If not, in which order do they reach the ground?

B) Do the ball have the same speeds when they reach the ground? If not,what is the order of their speeds?

Science   Advanced-Physics   
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