Question

Calculate the work done in moving a body of mass 20kg from rest to the distance of 2 m with a acceleration of 5 metre per second square

Answer 1

Answer:

The work done in moving a body of mass 20kg from rest to the distance of 2 m with an acceleration of 5 m/s² is 200 J.

Explanation:

The given mass of the body, m = 20 Kg

The acceleration of the body, a = 5 m/s²

Then the force acting on the body can be found as:

F = ma

F = 20 × 5 = 100 N

The distance through which the body moved will be equivalent to the displacement of the body.

∴ Displacement of the body, d = 2 m

Then the work done on the body to make the displacement is:

Work done = force × displacement

  W = f × d

  W = 100 × 2

∴ W = 200 J