A horizontal force of 85.2 N is applied to a 44.5 kg crate on a rough, level surface. if the crate accelerates at 1.13 m/s^2, what is the magnitude of the force of kinetic friction (in N ) acting on the crate?

the figure shows a woman pulling a suitcase. the suitcase moves at constant velocity. the rope ( strap) makes angle 56.8 degrees with the horizontal. if she pulls the strap with a force of 36.5 N and the suitcase has a mass of 14.0 kg, what is the magnitude of the normal force acting on the suitcase

You are pushing a rubber crate against a concrete floor. The two surfaces have a static coefficient of friction of 0.61 and a kinetic coefficient of friction of 0.49. The floor is horizontal, and the crate has a mass of 25.0 kg, and is initially at rest. You are pushing with a horizontal force of 100 N. What is the magnitude of the force of friction in this case? Give your answer in units of N, to three significant figures.

A tractor is being used to pull two large logs across a field. A chain connects the logs to each other; the front log is connected to the tractor by a separate chain. The mass of the front log is 180 kg. The mass of the back log is 220 kg. The coefficient of friction between the logs and the field is approximately 0.45. The tension in the chain connecting the tractor to the front log is 1850 N. Determine the acceleration of the logs and the tension in the chain that connects the two logs.