Start Free Mock LoginAlready registered? Login here

Physics - Kinematics Question with Solution | TestHub

PhysicsKinematicsRelative motionMedium2 minQB

PhysicsMediuminteger

A man can reach directly across a stream of width 20 m in 4 minutes when there is no flow and in 5 minutes when there is a flow. Find the velocity of the flow in $m / min$ .

Answer:

Solution:

Speed of the man in still water: $v = \frac{20}{4} = 5 m/min$

With flow he crosses directly in 5 min, so the component across the stream is $\frac{20}{5} = 4 m/min$

$v^{2} - u^{2} = 4 \Rightarrow u = 25 - 16 = 3 m/min$

Answer: 3

Stream:JEESubject:PhysicsTopic:KinematicsSubtopic:Relative motion

⏱ 2mℹ️ Source: QB

Doubts & Discussion

Loading discussions...