Kinematics 3 Question 6

6. A river is flowing from West to East at a speed of 5m/min. A man on the South bank of the river, capable of swimming at 10m/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 East of North

(c) 30 West of North

(d) 60 East of North

Assertion and Reason

Mark your answer as

(a) If Statement I is true, Statement II is true; Statement II is the correct explanation for Statement I

(b) If Statement I is true, Statement II is true; Statement II is not a correct explanation for Statement I

(c) If Statement I is true; Statement II is false

(d) If Statement I is false; Statement II is true

Show Answer

Answer:

Correct Answer: 6. (a)

Solution:

  1. To cross the river in shortest time, one has to swim perpendicular to the river current.


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