A 9-kg box of oranges slides from rest down a frictionless incline from a height of 5.0 m. A constant frictional force, introduced at point A, brings the block to rest at point B, 19 m to the right of point A. What is the coefficient of kinetic friction, µk, of the surface from A to B? 5.0 m A В 19 m
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- A 200-g hockey puck is launched at an initial speed of 16 m/s up a metal ramp that is inclined at a 30° angle. The coefficients of static and kinetic friction between the hockey puck and the metal ramp are μs = 0.40 and μk = 0.30, respectively. What vertical height does the puck reach above itsstarting point?A 3.00-kg block is sent up a ramp inclined at an angle ?=27.0∘ from the horizontal. It is given an initial velocity ?0=15.0 m/s up the ramp. Between the block and the ramp, the coefficient of kinetic friction is ?k=0.30 and the coefficient of static friction is ?s=0.80. What distance ? along the ramp's surface does the block travel before it comes to a stop?A 1090 kg boat is traveling at 92 km/h when its engine is shut off. The magnitude of the frictional force ?→?f→k between boat and water is proportional to the speed v of the boat: fk = 85v, where v is in meters per second and fk is in newtons. Find the time required for the boat to slow to 46 km/h.
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