Question

What will be the work done, when a body of mass 100 kg moves uniformly on a frictionless surface through
a distance of 5 m?​

Answer 1

Answer:

Given Mass of the object m=50kg and displacement s=100m.

Now frictional force f=μN where μ=coefficient of friction and N= normal force

We know N=mg; where g=acceleration due to gravity =10 m/s

2

N=50×10=500N.

Thus frictional forcef=500μ

Again work done by frictional forceW

f

=fscosθ where s= displacement =100 m and θ=0

0

ThereforeW

f

=500μ×100=50μkJ