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A 62 kg skier coasts up a snow-covered hill that makes an angle of 25° with the horizontal. The initial speed of the skier is 6.9 m/s. After coasting a distance of 1.9 m up the slope, the speed of the skier is 3.9 m/s.
(a) Find the work done by the kinetic frictional force that acts on the skiis.
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(b) What is the magnitude of the kinetic frictional force?
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You have a mass of 77 kg and are on a 43 degree slope hanging on to a cord with a breaking strength of 209 newtons. What must be the coefficient of static friction to 2 decimal places between you and the surface for you to be saved from the fire..
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A uniform ladder of length L and mass 5 kg rests against a smooth, frictionless, vertical wall. Find the minimum angle,between the ladder and the ground at which the ladder will not slip
Imagine that in a certain proton accelerator, roughly 1011 protons at a time go around a ring having a radius of 4.0 km, What is the current flowing in the ring, in amperes
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