A 3-kg explosive object,which is at rest on a smooth plane fragments into two pieces of masses 1-kg and 2-kg after an internal explosion. If the 2-kg piece moves due east at speed of 3m/s,what is

Problem 1.

A 3-kg explosive object,which is at rest on a smooth plane fragments into two pieces of masses 1-kg and 2-kg after an internal explosion. If the 2-kg piece moves due east at speed of 3m/s,what is the velocity of other piece?

Problem 2.

Calculate the speed V of a 12-kg object, which is released from the height h₁=40m,at the moment it passes a height h₂=20m.(neglect any friction effects)

(take g=10N/kg)

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