A 3 kg block sits on a level table and a string runs over the edge of the table on a pulley to a mass of 10 kg. Find the velocity of the hanging mass after 5 seconds if it starts at rest and if the coefficient of friction is 0.7.

A 9.08 kg mass is released from rest while on and incline of 58.65 degrees. If the coefficient of kinetic friction is 0.301, what is the magnitude of the acceleration of the mass?

Imagine that Chris, whose mass is 45 kg, has fallen into a crevasse in a glacier. Chris's partner Pat, whose mass is 65 kg, has thrown a rope to Chris and intends to lift Chris out by holding on to the other end of the rope while sliding down the glacier’s icy slope which is tilted at an angle of 35o with respect to the horizontal. Assume that Pass has used some camping equipment to cobble together a pretty good pulley to change the rope’s direction at the lip of the crevasse. Also assume that Chris hangs freely when suspended below the lip of the crevasse. Is it possible for Pat to pull Chris out, considering the likely coefficients of friction involved? Pat has a 30-kg backpack. Could this help?

Consider a large truck carrying a heavy load, such as steel beams. A significant hazard for the driver is that the load may slide forward, crushing the cab, if the truck stops suddenly in an accident or even in braking. Assume, for example, that a 15000-kg load sits on the flatbed of a 20000-kg truck moving at 15.0 m/s. Assume the load is not tied down to the truck and has a coefficient of static friction of 0.600 with the truck bed. (a) Calculate the minimum stopping distance for which the load will not slide forward relative to the truck.  (b) Is any piece of data unnecessary for the solution? (Select all that apply.) mass of the loadmass of the truckvelocitycoefficient of static frictionall are necessary