A bicycle moves with a constant velocity along a straight horizontal road. If the forward force which the cyclist exerts by pedalling is 28 N, what is the magnitude of the resistive force acting on the bicycle and cyclist ?

Answer

Answer 9.3

Solution

Solution 9.3

Exercise 9.4

A block, of mass 4 kg, is being dragged across a rough horizontal surface at a constant velocity by a force of 20 N acting parallel to the surface. Find the coefficient of friction between the object and the surface.

Answer

Answer 9.4

Solution

Solution 9.4

Exercise 9.5

A skier of mass 60 kg is travelling at a constant speed down a slope inclined 20\displaystyle {}^\circ to the horizontal, subject to; air resistance and friction where the coefficient of friction between skier and the slope is 0.05. Find the magnitude of the air resistance force acting on the skier.

Answer

Answer 9.5

Solution

Solution 9.5

Exercise 9.6

A car of mass 1600 kg is towed up a hill of inclined at 5\displaystyle {}^\circ to the horizontal. The car moves with a constant velocity. The tow rope is at an angle of 7\displaystyle {}^\circ to the hill.