a) At a cel!ain instant; a particle-~ke object is acted on
Chapter , Problem 50(choose chapter or problem)
a) At a cel!ain instant; a particle-~ke object is acted on by a force F = (4.0 N)i (2.0 N)j + (9.0 N)k while the object's velocity is v = -(2.0 m/s)i + (4.0 m/s)k. What is the instantaneous rate at which the force does work on the object? (b) At some other time, the velocity consists of only a y component. If the force is unchanged and the instantaneous power is -12 W, what is the velocity of the object?
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