A wedge is kept over a frictionless horizontal surface. A block is placed at top ‘A’ and slips to
bottom ‘B’ of the wedge all surface are frictionless. Then during the motion of block from ‘A’ to ‘B’
Column-I | Column-II |
(i) Magnitude of momentum of block+ wedge system in horizontal direction | [A] Conserved |
(ii) Mechanical energy of block | [B] Not conserved |
(iii) Magnitude momentum of block+wedge system | [C] Increases |
(iv) Angular momentum of block about ‘O’ | [D] Decreases |
Text Solution
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(i)-[A], (ii)-[B], (iii)-[B], (iv)-[A]
Sol. Free body diagram of block + wedge system
Net external force in horizontal direction = 0
Net external force in vertical direction 
0
Angular momentum of block about O at A and B both are zero.
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