Answer:
(i)
The frictional force acts on cart wheel in opposite direction to motion of the
cart. (1)
(ii) When water is pushed out of sprinkler with a force, it exerts
reaction force on the sprinkler, causing it to rotate.
(1)
(iii) Water drops have inertia of rest. They do not move with
the cloth as it is jerked and come out. (1)
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