Question

A force of $25N$ is applied at an angle of $60°$in the direction of displacement. Calculate the amount of work done by the force if the displacement of the block is $5m$.

• A. $10J$
• B. $20J$
• C. $40J$
• D. $50J$

Answer 1

Answer: (D)

Given,

Force = $F=25N$

Displacement = $s=5m$

Angle between force and displacement = $\theta ={60}^0$

We know that, Work done = $W=F\times s\times Cos\theta$

$\therefore W=25\times 5\times \frac{1}{2}=62.5J$