Q. 34.7( 6 Votes )

No work is done when:
A. a nail is hammered into a wooden box

B. a box is pushed along horizontal floor

C. there is no component of force, parallel to the direction of motion

D. none of these

Answer :

formula for work done when the force is applied at an angle to the direction of motion is given by,

W = FS cosθ


When there will be no component of force, parallel to the direction of motion then force F in direction of motion is zero, so work done will also be zero.

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