Question

a roller of mass 1000 kg is displaced through one kilometre using a force of 200 Newton in the direction making an angle of 60 degree with the ground the work done is ​

Answer 1

Given:

Mass of 1000 kg displaced with a force of 200 Newton by 1 km at angle of 60°.

To find:

Net work done ?

Solution:

The net work done will be :

$W = F \times d \times \cos( \theta)$

$\implies W = 200 \times 1 \times \cos( {60}^{ \circ} )$

$\implies W = 200 \times 1 \times \dfrac{1}{2}$

$\implies W = 100 \: J$

So, net work done is 100 Joules.