Question

A force of $10N$ displaces an object by $10m$. If work done is $50J$, then direction of force makes an angle with direction of displacement

• A. ${120}^o$
• B. ${90}^o$
• C. ${60}^o$
• D. $Noneofthese$

Answer 1

The correct option is C ${60}^o$

As we know that work done is given by:

$W=Fdcos\theta \Rightarrow cos\theta =\frac{W}{Fd}=\frac{50}{10\times 10}=\frac{1}{2}$

$\Rightarrow \theta ={60}^0$