A 25 kg wooden plate is held in place by two strings attched to the ceiling and the wall. The string attched to the ceiling makes an angle 40° with the horizontal and the string attached to the wall makes 90° with the wall. Determine the force in each string.

A vertical force f is applied to a block of mass m that lies on a floor.What happens to the magnitude of the normal force f on the block from the floor as magnitude F is increased from zero if force f is (a) downward and (b) upward?

A 2.30 kg block is initially at rest on a horizontal surface. A horizontal force F of magnitude 5.316 N and a vertical force P are then applied to the block (see the figure). The coefficients of friction for the block and surface are us = 0.4 and uk = 0.25. Determine the magnitude of the frictional force acting on the block if the magnitude of P is (a)8.00 N and (b)12.0 N. (The upward pull is insufficient to move the block vertically.) (a) Number Units (b) Number Units

A 12 N horizontal force pushes a block weighing 5.0 N against a vertical wall . The coefficient of static friction between the wall and the block is 0.60, and the coefficient of kinetic friction is 0.40. Assume that the block is not moving initially. (a) Will the block move? (b) In unit-vector notation, what is the force on the block from the wall?

A 2.30 kg block is initially at rest on a horizontal surface. A horizontal force of magnitude 5.92 N and a vertical force are then applied to the block (see the figure). The coefficients of friction for the block and surface are us = 0.4 and Uk = 0.25. Determine the magnitude of the frictional force acting on the block if the magnitude of P is (a)7.00 N and (b)10.0 N. (The upward pull is insufficient to move the block vertically.) (a) Number i (b) Number i Units Units P € }

A box with a weight of 50 N rests on a horizontal surface. A person pulls horizontally on it with a force of 15 N and it does not move. To start it moving, a second person pulls vertically upward on the box. If the coefficient of static friction is 0.4, what is the smallest vertical force for which the box moves?

2 crates are connected to each other by a rope. One crate(m=17kg) is sitting by the ledge of a cliff, and has a coefficient of friction between itself and the ground of 0.21. The second crate(m=11kg) is hanging off the edge of the cliff. Assuming that the hanging crate is heavy enough to pull the crate by the ledge to the right. Find a) and b) and Draw FBD for each crate T-E1. a) The acceleration of the system b) The tension force that connects 2 crates together Paragraph I

A wedge with mass M rests on a frictionless, horizontal tabletop. A block with mass m is placed on the wedge, and a horizontal force F S is applied to the wedge (Fig.). What must the magnitude of F S be if the block is to remain at a constant height above the tabletop?

Two sheets of plywood A and B lie on the bed of the truck. They have the same weight W, and the coefficient of static friction between the two sheets of wood and between sheet B and the truck bed is µg. (a) If you apply a horizontal force to sheet A and apply no force sheet B to move? What force is necessary to cause sheet A to start to sheet B, can you slide sheet A off the truck without causing moving? (b) If you prevent sheet A from moving by exerting a horizontal force on it, what horizontal force on sheet B is necessary to start it moving? ܥܪ ܩ A B L