Question

Tim pushes a box with a constant force 250 N at an angle of 45° to the horizontal. If he pushes the box 22 meters, how much work has he done? Keep 4 significant figures.

Answer 1

Answer: 3889 J

Explanation:

Given

Force applied $F=250\ N$

the direction of application is $\theta=45^{\circ}$ above the horizontal

If he pushes the box 22 m

Work done is given by the dot product of force and displacement

$\Rightarrow W=F\cdot s\\\Rightarrow W=250\times 22\times \cos 45^{\circ}\\\Rightarrow W=3889\ J\quad [\text{upto four significant figure}]$

Hence, option (d) is correct.