Question

a crate is moved by pulling the rope attached to it it moves 10m on a road by a force of 100N find work if the rope is parallel to road and if the rope is making an angle 30 degree with the road

Answer 1

Answer:

The work done is 866.025 Joules.

Explanation:

If a force F is acting on a object on a floor making an angle Ф with the floor.

Then , the horizontal component of the force F will be FcosФ and the vertical component will be FsinФ.

In this case ,

The force working on the crate is 100 N and it is making an angle of 30°.

Then , the horizontal force working on the crate is ( 100 × cos30° ) N.

And , the displacement of the crate due to the force is 10 meters.

∴ The work done by the force is ( 100 × cos30° × 10 ) = 866.025 Joules.