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A System Comprising Two Blocks Is Shown, One of Which

question 10

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  A system comprising two blocks is shown, one of which is on an inclined plane. The pulley is of negligible mass and is frictionless. The system starts from rest at position 1 and accelerates. Measurements taken when the blocks reach position 2 indicate that 1)  the kinetic energy of block A has changed by 330 J; 2)  the potential energy of block A has changed by 588 J; 3)  the kinetic energy of block B has changed by 110 J; and 4)  the potential energy of block B has changed by 98 J.The amount of mechanical energy that has been converted to heat because of friction is A)  12 J B)  50 J C)  258 J D)  478 J E)  710 J A system comprising two blocks is shown, one of which is on an inclined plane. The pulley is of negligible mass and is frictionless. The system starts from rest at position 1 and accelerates. Measurements taken when the blocks reach position 2 indicate that 1) the kinetic energy of block A has changed by 330 J;
2) the potential energy of block A has changed by 588 J;
3) the kinetic energy of block B has changed by 110 J; and
4) the potential energy of block B has changed by 98 J.The amount of mechanical energy that has been converted to heat because of friction is

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