SATHEE: Motion in a Plane - Result Question 55

Motion in a Plane - Result Question 55

58. A person swims in a river aiming to reach exactly opposite point on the bank of a river. His speed of swimming is $0.5 m / s$ at an angle $120^{\circ}$ with the direction of flow of water. The speed of water in stream is

[1999]

(a) $1.0 m / s$

(b) $0.5 m / s$

(d) $0.43 m / s$ .

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Answer:

Correct Answer: 58. (c)

Solution:

Velocity of person, ${\vec{v}}_{m} = 0.5 m / s$

$\begin{aligned} \sin 30^{\circ} = \frac{v_{w}}{v_{m}} \Rightarrow v_{w} = v_{m} \sin 30^{\circ} \\ \Rightarrow v_{w} = \frac{v_{m}}{2} = \frac{0.5 m / s}{2} = 0.25 m / s \end{aligned}$

Motion in a Plane - Result Question 55

58. A person swims in a river aiming to reach exactly opposite point on the bank of a river. His speed of swimming is $0.5 m / s$ at an angle $120^{\circ}$ with the direction of flow of water. The speed of water in stream is

Answer:

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Motion in a Plane - Result Question 55

58. A person swims in a river aiming to reach exactly opposite point on the bank of a river. His speed of swimming is 0.5m/s at an angle 120∘ with the direction of flow of water. The speed of water in stream is

Answer:

Engineering Preparation

Medical Preparation

NCERT Books & Solutions

Important Resources

Other Resources

Syllabus

Test Platform

Sample Mock Test

Mentorship

NCERT Exercise Video Solution

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58. A person swims in a river aiming to reach exactly opposite point on the bank of a river. His speed of swimming is $0.5 m / s$ at an angle $120^{\circ}$ with the direction of flow of water. The speed of water in stream is