when is the work done by a force on a body : positive
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Work done by a force applied on a body is:
a) When the direction of motion of the body and the force acting in the same direction , work done is positive.
b) When the direction of motion of the body and the force acting on the body are in the opposite direction , work done is negative.
c) When the force is acting at right angle to the direction of motion of the body , work done is zero.
a) When the direction of motion of the body and the force acting in the same direction , work done is positive.
b) When the direction of motion of the body and the force acting on the body are in the opposite direction , work done is negative.
c) When the force is acting at right angle to the direction of motion of the body , work done is zero.
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