Question

A body travels through a distance of $10m$ on a straight line, under the influence of $5N$. If the work done by the force is $25J$, the angle between the force and displacement is

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

Answer 1

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

Work $=F.x$

$w=Fx\cos \theta$.

$25=5\times 10\times \cos \theta$

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

So, $\theta ={60}^o$