Two objects, x and y, are held at rest on a horizontal frictionless surface and a spring is compressed between them. the mass of x is half of the mass of y. immediately after the spring is released, x has a kinetic energy of 30 j and y has a kinetic energy of: a. 45 j b. 7.5j c. 30 j d. 15 j e. 60 j
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You throw a small rock straight up from the edge of a highway bridge that crosses a river. the rock passes you on its way down, 7.00 s after it was thrown. what is the speed of the rock just before it reaches the water 28.0 m below the point where the rock left your hand? ignore air resistance.
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Two objects, x and y, are held at rest on a horizontal frictionless surface and a spring is compress...
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