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A block of mass `m` slides down a wedge of mass `M` as shown . The whole system is at rest , when the height of the block is `h` above the ground. The wedge surface is smooth and gradually flattens. There is no friction between wedge and ground. If there would have been friction wedge and block , which of the following quantities would still remains conserved ?A. Linear momentum of the system along horizontal directionB. Linear momentum of the system along vertical directionC. Linear momentum of the system along a tangent to the curved surface of the wedgeD. Mechanical energy of the system |
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Answer» Correct Answer - A Linear momentum is conserved only in horizontal direction. Net `F_(ext)` on system is zero in horizontal direction therefore linear momentum is conserved only in horizontal direction. |
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