A body of 200 N weight rests on a horizontal plane, the coefficient of friction between the body and the plane is 0.25. Find the force inclined upwards at 30° to the horizontal which will just cause motion.

If PCD=6000lb and PGD=1000lb (both compression), find P and Q.

Determine the smallest horizontal force P that must be applied to block B to cause impending motion. The angles of static friction are 15 between the blocks and 30 between the blocks and the ground.

Calculate the horizontal force P required to push the 85-lb lawn mower at constant speed. The center of gravity of the mower is at G, and the coefficients of rolling resistance are 0.12 for the front wheels and 0.18 for the rear wheels.

The coeffient of static friction between the uniform bar AB of weight W and the ground is 0.45. Find the smallest angle and the corresponding force P that would initiate simultaneous tipping and sliding of the bar.

Draw the FBD of the entire frame, assuming that friction and the weights of the members are negligible. How many unknowns appear on this FBD?

Two identical chairs, each weighing 14 lb, are stacked as shown. The center of gravity of each chair is denoted by G. The coefficient of static friction is 0.2 at B (the contact point between the chairs) and 0.35 at A, C, and D. Determine the smallest force P that would cause sliding.

A box weighing 150lb is moved across a horizontal  Floor by dragging it by means of a rope attached to the front end. If the rope makes an angle of 30° with the floor and if the coefficient of friction between box and floor is 0.400, find the force exerted by the man pulling the rope.

If a piece of block weighing 150 kg is to be pulled up by a winch using two cables on a 25 deg inclined plane, find the least force each cable will be subjected to set the block in motion. Assume the coefficient of friction to be 0.25.

A body weighing 500N is held by a rope that passes over a horizontal drum, the angle of contact being 150°. If the coefficient of friction between the rope and the drum is 0.3 find the least force that will hold the body.