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

(1) 0°

(2) 30°

(3) 60°

(4) 90°

Concept Videos :-

#1 | Work: Definition
#2 | Solved Problems

Concept Questions :-

Concept of work

(3) $W=Fs\mathrm{cos}\theta$

$\mathrm{cos}\theta =\frac{W}{Fs}=\frac{25}{50}=\frac{1}{2}$

$\theta =60°$

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