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23 August, 15:36

A force of 20N acts on a particle of mass 2 Kg and displaces it by

5m at an angle 30°. What is the work done?

Answers (1)
  1. 23 August, 16:05
    86.6Nm (j)


    we know,




    as we know the distance but we doesnot know the exact force. becauseit acts at an angle. This mean the orginal force of 20N is essentially split up in 2 direction in along axis of displacement, and perpendincular direction that occur at 30degree angle.

    the resultant displacement of object is along a line inclined by 30 degrees of that orginal plane, then the force acting in the direction of that displacement equal to 20*cos30. I. e, 17.32.
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