JEE PYQ: Motion In Two Dimensions Question 15
Question 15 - 2019 (09 Apr Shift 1)
The stream of a river is flowing with a speed of 2 km/h. A swimmer can swim at a speed of 4 km/h. What should be the direction of the swimmer with respect to the flow of the river to cross the river straight?
(a) $90°$ (b) $150°$ (c) $120°$ (d) $60°$
Show Answer
Answer: (c)
Solution
$\sin\theta = V_r/V_s = 1/2$, $\theta = 30°$. Direction w.r.t. flow $= 90° + 30° = 120°$.
BETA
