Q. 125.0( 1 Vote )

The work done by a force on a body will be positive if the:
A. body does not move

B. body moves perpendicular to the direction of motion

C. body moves along the direction of the applied force

D. body moves opposite to the direction of the applied force

Answer :

Work done by a force will be positive when the direction of applied force and the direction of motion is same.

When force is applied at an angle to the direction of motion of object then the work in the direction of motion is given by: W = Fs cos θ


When F and s are in same direction then cos θ will give positive value and work done will be positive.

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