Asolid spherical ball starts from rest at height h at the top of a hill and begins rolling without slipping down the hill.
(a) what is the speed of the ball when it is halfway down the hill?
(b) at the halfway point (height h/2), the hill becomes smooth, so there is no longer any friction between the hill and the sphere. what is the speed of the ball at the bottom of the hill?
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Astone weighing 1.5 kilograms is resting on a rock at a height of 20 meters above the ground. the stone rolls down 10 meters and comes to rest on a patch of moss. the gravitational potential energy of the stone on the moss is joules.
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While standing outdoors one evening, you are exposed to the following four types of electromagnetic radiation: yellow light from a sodium street lamp, radio waves from an am radio station, radio waves from an fm radio station, and microwaves from an antenna of a communications system. rank these type of waves in terms of increasing photon energy.
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Asolid spherical ball starts from rest at height h at the top of a hill and begins rolling without s...
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