Question

a body moves a distance of 10m along a straight line under the action of a force of 5N. if the work done is 25 joules find the angle which the force makes with the direction of motion of body

Answer 1

Work done for moving body is given by,

$W=F.s$

Where F = Force applied

s= distance of body

$W= F s cos \alpha$

$25 = 10 x 5 cos \alpha$

$cos \alpha =\frac{1}{2}$

$\alpha =60$

Thus, force makes angle of 60 degree with direction of motion

Answer 2

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