Question

A body rolled on a surface with a speed of 10 metre per second comes to rest after covering a distance of 50 metre find coefficient of friction

Answer 1

Answer:

Initial kinetic energy was

2

1

mv

2

=

2

1

×m×100=50m, m is mass of the body.

as it comes to rest so wok done is loss in kinetic energy i.e. W=50m

Maximum kinetic friction is F=μmg so work done W=F×distance=μmg×50meter=500mμ

Equating both values of W we get 500mμ=50m

so μ=0.10