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Give Reason:

1.A rolling ball stops after moving some distance
2.What kind of friction comes into play:
(a) When a block of wood kept on table moves slowly.
(b) When a block of wood kept on table just tends to move (or slip)
(c) When a block of wood kept on cylindrical iron rods moves.


1. Because friction or opposing force acts on it 2.sliding friction Sliding friction rolling friction
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1. Frictional force. 2. (a) sliding force. (b) sliding force. (c) sliding and rolling force.
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