Suppose the friction coefficient between the ground and the ladder of the previous problem is 0.540. Find the maximum weight of a mechanic who could go up and do the work from the same position of the ladder.

A heavy uniform metal chain is kept on the surface of a horizontal table. The coefficient of friction between the chain and the table surface is 0.02 . Find the maximum fraction of length of the chain that could hung over on one edge of the table ?

A uniform ladder 5.0 m long rests against a frictionless, vertical wall with its lower end 3.0m to from the wall. The ladder weighs 160 N . The coefficient of static friction between the foot of the ladder and the ground is 0.40 . A man weighing 740 N climbs slowly up the ladder. How far along the ladder can the man climb before the ladder starts to slip?

A uniform ladder 5.0 m long rests against a frictionless, vertical wall with its lower end 3.0m to from the wall. The ladder weighs 160 N . The coefficient of static friction between the foot of the ladder and the ground is 0.40 . A man weighing 740 N climbs slowly up the ladder. What is the maximum frictional force that the ground can exert on the ladder at its lower end?

A uniform ladder 5.0 m long rests against a frictionless, vertical wall with its lower end 3.0m to from the wall. The ladder weighs 160 N . The coefficient of static friction between the foot of the ladder and the ground is 0.40 . A man weighing 740 N climbs slowly up the ladder. What is the actual frictional force when the man has climbed 1.0 m along the ladder?

A uniform ladder 5.0 m long rests against a frictionless, vertical wall with its lower end 3.0m to from the wall. The ladder weighs 160 N . The coefficient of static friction between the foot of the ladder and the ground is 0.40 . A man weighing 740 N climbs slowly up the ladder. What is the actual frictional force when the man has climbed 1.0 m along the ladder?

In the figure shown, a solid sphere of mass 'm' and radius r is released from a height 6r to slide down a smooth surface. A plank of same mass 'm' touches the horizontal portion of the surface at the ground. The co-efficient of friction between the plank and the sphere is mu and that between the plank and the ground is mu//4 . Find the work done by the friction force between the plank and the ground till the sphere starts pure rolling on the plank. Neglect the height of the plank.

In the figure shown, a solid sphere of mass 'm' and radius r is released from a height 6r to slide down a smooth surface. A plank of same mass 'm' touches the horizontal portion of the surface at the ground. The co-efficient of friction between the plank and the sphere is mu and that between the plank and the ground is mu//4 . Find the work done by the friction force between the plank and the ground till the sphere starts pure rolling on the plank. Neglect the height of the plank.