If a machine overcomes a load 'L' and the distance travelled by the load is 'Ld', the work done by the load will be __________.

Question

Question

This question was previously asked in

RRB ALP Fitter 23 Jan 2019 Official Paper (Shift 3)

Answer 1

=Concept:

Work done:

Work done on an object along a given direction of motion is equal to force times the displacement times the cosine of the angle.
Formula, work done, W = Fscosθ, where F = force, s = displacement, θ = angle between the displacement and the force.
The SI unit of work done is Joule (J).

Calculation:

If a machine overcomes a load 'L' and the distance travelled by the load is L_d,

work done, W = Fscosθ

Here, θ = 0º, cos0º = 1

So, work done W = Fs

W = L × L_d