Question

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

• A. $0^{\circ }$
• B. ${30}^{\circ }$
• C. ${60}^{\circ }$
• D. ${90}^{\circ }$

Answer 1

The correct option is C ${60}^{\circ }$

$W=Fs\cos \theta ,cos\theta =\frac{W}{Fs}=\frac{25}{5\times 10}=\frac{1}{2},\theta ={60}^{\circ }$