4. A 28.0 kg crate is being push across a horizontal floor with a force F = 155 N that makes an angle θ = 28.0° with the horizontal as illustrated in the figure below. Find the magnitude of the acceleration of the crate, given that the coefficient of kinetic friction between the crate and the floor is 0.13.

A 100 kg block is at rest on a flat floor with a coefficient of static friction 0.62. A horizontal force of 3.7 N is applied to the block, but it does not budge. What is the magnitude of the frictional force on the block applied?

The figure shows two blocks of wood connected by a light string. The first block has mass m, = 4.90 kg and the second block has mass m, = 2.20 kg. A constant horizontal force of magnitude P = 16.0 N acts on the first block and both blocks are sliding to the right. The coefficient of kinetic friction between each block and the horizontal surface is ur = 0.100. m2 Determine the magnitude of the tension T in the string connecting the blocks. X N Question 4.5b: Two blocks with masses m, 4.60 kg and m, = 7.40 kg are connected by a light string, as in the figure. Mass m, is descending and mass m, is moving to the right across a horizontal surface with a coefficient of kinetic friction given by µK = 0.160. m, m, Determine the acceleration a of m, and the magnitude T of the tension in the string. a = m/s?

Problem 1: While training on the planet Dagobah, Luke Skywalker is asked by Yoda to hold a block with a mass of 6.80kg against a vertical wall using only the Force. Luke applies the Force with a magnitude of 115.0N at an angle of 52.0° with respect to the horizontal. Luke discovers that if the Force increases any more, the block begins to slide up the wall. What is the coefficient of static friction between the block and the wall? Assume that gravity on Dagobah is the same as gravity on Earth.