

MCQOPTIONS
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1. |
In which of the following does friction play a helpful role? (i) Striking a match stick (ii) Playing snooker (iii) Writing on the blackboard |
A. | Only (i) and (ii) |
B. | Only (ii) and (iii) |
C. | Pressure at a given depth inside a stationary liquid is different at all points on the horizontal plane. |
D. | (i), (ii) and (iii) |
Answer» E. | |