A block of mass is pulled along a horizontal rough surface by a constant horizontal…
PHYSICS · Multi-part · CBSE · Physics · Work, Energy and Power · Work, Energy and Power
Problem
A block of mass 4kg is pulled along a horizontal rough surface by a constant horizontal force of 25N. The coefficient of kinetic friction between the block and the surface is 0.30. The block starts from rest and moves through a distance of 10m.
(i) Write an expression for the net work done on the block in terms of the given numerical values.
(ii) Calculate the magnitude of the kinetic friction acting on the block.
(iii) Determine the speed of the block after it has moved 10m. Give your answer to two significant figures.