A boy,pulls a 1.0 kg toy horizontally in a straight line at a constant speed of 20 m/min by exerting a 3.0 N force at an angle of 30 degrees with the horizontal.What is the average power developed by the boy?
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Expert's answer
2010-11-04T14:41:55-0400
The average power will be equal to the total work (F*S, there F is the force, S - is the path) per some time (t):
W = (F*S)/t = F * V (v - speed);
As the force exerts at the angle to the horizont, we have to take its projectile:
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