Kinematics Ques 21
- A river is flowing from West to East at a speed of $5 m / min$. A man on the South bank of the river, capable of swimming at $10 m / min$ in still water, wants to swim across the river in the shortest time. He should swim in a direction
(1983, 1M)
(a) due North
(b) $30^{\circ}$ East of North
(c) $30^{\circ}$ West of North
(d) $60^{\circ}$ East of North
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Answer:
Correct Answer: 21.(a)
Solution:
Formula:
- To cross the river in shortest time, one has to swim perpendicular to the river current.
BETA
