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 1 kN block is resting on a 45 degree plane with a coefficient of friction of 0.4. Find the required force P acting horizontally that will start the block up the plane.

A 250N crate is pulled up a ramp that is angled at 20 degrees above the horizontal. If the coefficient of friction is 0.25, find the y-component of the weight.

A dictionary is pulled to the right at constant velocity by a 10 N force acting 30° upward above the horizontal. The coefficient of kinetic friction between the book and the horizontal surface is 0.5. What is the weight of the book?