Question

5. A pile-driver of mass 380.0 kg moving at 20.0 m/s hits a stationary stake of mass 20.0 kg. If the two move off together, calculate their common velocity. 6. Show that the collision in questions 1 is elastic; that is find total KE before collision and total KE after collision. If they are equal, then collision is elastic.
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Answer #1

Concept: Here we use conservation of momentum principle to find the common velocity.

mơn conservahon momentuun before collisionmomentum afler collision OS***************************************************************************************************
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