Question

what is relative velocity? explain how a man can hold his umbrella while walking on ground in a rain?​

Answer 1

Answer:

Relative velocity is the velocity of a body with respect to another.

Explanation:

If rain is falling from front he should hold the umbrella against the direction of the rain

Answer 2

Relative velocity and a man can hold his umbrella while walking on ground in a rain

Explanation:

• Relative velocity is defined as the velocity of an object B in the rest frame of  another object A.

• Let rain be falling vertically downward with a velocity Vr and a man is be moving horizontally with velocity Vm. Then, the relative velocity of rain relative to man is given by $V_{rm} = V_r - V_m$

• As shown in the figure the relative velocity of rain with respect to man appears to be falling at an angle θ from vertical, where

                                          $Tan \theta = \frac{V_m}{V_r}$

                                          $V_{rm} = \sqrt{V_r^2+ V_m^2}$

         Hence. the man should hold his umbrella at an angle θ

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