Question

A block with a mass of 33.0 kg is pushed with a horizontal force of 150 N. The block moves at a constant speed across a level, rough surface a distance of 4.95 m.
(a) What is the work done (in J) by the 150 N force?

_________J

(b) What is the coefficient of kinetic friction between the block and the surface?
________

Answer 1

The work done is given by 742.5 J while the coefficient of kinetic friction between the block and the surface is 0.46.

What is the work done?

The work done is given by the use of the formula;

W = F * x

Where;

F = force applied

x = distance covered

W = 150 N *  4.95 m = 742.5 J

Now;

The coefficient of kinetic friction is given by;

μ = F/mg

μ = 150/ 33 * 9.8

μ = 0.46

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