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A force acting on a body in empty space increases at a constant rate from zero. The body has a mass of 10 kg, and after 4 seconds the force is 50 N.

A force acting on a body in empty space
increases at a constant rate from zero. The
body has a mass of 10 kg, and after 4 seconds
the force is 50 N.
What is the speed of the object at 4 sec-
onds?

This question was asked on Mar 23, 2010.

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