Kinematics Question 650

Question: If Vr it’s the velocity of rain falling vertically and Vm it’s the velocity of a man walking on a level road, and θ it’s the angle with vertical at which he should hold the umbrella to protect himself than the relative velocity of rain w.r.t. the man it’s given by:

Options:

A) Vrm=Vr2+Vm2+2VrVmcosθ

B) Vrm=Vr2+Vm22VrVmcosθ

C) Vrm=Vr2+Vm2

D) Vrm=Vr2Vm2

Show Answer

Answer:

Correct Answer: C

Solution:

[c] According to Pythagoras theorem Vrm=Vr2+Vm2



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