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?

86.6Nm (j)

Explanation:

we know,

w=Fd

w=17.32*5

w=86.6Nm.

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.