The horizontal force P 421 N. Determine the normal reaction forces at A and B. The mass of the cylinder is m = 9 kg and that of cart is M = 38 kg. Neglect all friction.

Determine the distance s to which the 53-kg painter can climb without causing the 3.5-m ladder to slip at its lower end A. The top of the 17-kg ladder has a small roller, and at the ground the coefficient of static friction is 0.24. The mass center of the painter is directly above her feet.Assume L = 3.5 m, a = 1.04 m

I have already done the question, but have some questions on the steps, please just answer that. The solution is already provided. Please answer with depth and clarity.   A 200-kg crate is placed on a platform and moved vertically through a hydraulic cylinder BE that exerts a vertical force of F=1.5 kN. Determine the force developed in links AB and CD at the instant θ=90°. The platform is at rest when θ=45°. Neglect the mass of the links and the platform.

A 480-lb lawn roller is to be pulled over a curb with a height of 8 in. as shown. Determine the minimum pulling force that must be applied by the man to just start the 4-ft diameter roller over the curb. Also determine the angle θ which gives the minimum pulling force. Assume that the pulling force is along the handle, which makes an angle of θ with the horizontal