The floor of a railroad flatcar is loaded with loose crates having a coefficient of static friction of 0.200 with the floor. If the train is initially moving at a speed of 51.0 km/h, in how short a distance can the train be stopped at constant acceleration without causing the crates to slide over the floor?

A crate has a mass of 120kg and the coefficient of static and kinetic friction is 0.60 and 0.50, respectively. The crate starts from rest and the motor exerts a tension T= 1220 + 200t (N). If the elevation of the dock is 30 degrees from the horizontal, What is the velocity of the crate after 1sec? Compute the power transmitted after 1sec. Provide FBD. Thank you.

40 kg object is being pushed downwards at an angle of 32° with the horizontal. If the coefficient of static friction is 0.4 and dynamic friction 0.35. Determine (a) what must be the applied force P to overcome static friction and (b) what will be the required force P if the box is already moving. P 32° 40kg

A mountain camper has problems with his off road vehicle. To hold it in place the camper wraps a rope abound a treen + turns. The coefficient of friction between the rope and the tree is u. = 0.23. The car pulls on its end of the rope with a force of 2250 N. The camper wants to pull on the rope with a force no greater than P = 54 N. P Determine the integer value of n. (Enter the minimum possible integer value of n.)