Kinematics Question 326
Question: A person aiming to reach the exactly opposite point on the bank of a stream is swimming with a speed of 0.5 m/s at an angle of $ 120{}^\circ$ with the direction of flow of water. The speed of water in the stream is [CBSE PMT 1999]
Options:
A) 1 m/s
B) 0.5 m/s
C) 0.25 m/s
D) 0.433 m/s
Show Answer
Answer:
Correct Answer: C
Solution:
$ \sin 30^{o}=\frac{v _{r}}{v _{m}} $
$ =\frac{1}{2}\Rightarrow v _{r}=\frac{v _{m}}{2} $ = $ \frac{0.5}{2} $
$ =0.25m/s $
BETA
