Rain is falling vertically with speed 10 m s–1. A man rides a motorcycle with a speed of 15 m/s towards east direction. The direction in which he should hold the umbrella is
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11th
Physics
Motion in a Plane
Relative Motion in 2 Dimension
Rain is falling vertically ...
PHYSICS
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Asked on November 22, 2019 by
Prince Sapahia
Rain is falling vertically with a speed of 30ms
−1
. A woman rides a bicycle with a speed of 10ms
−1
in the north to south direction. What is the direction in which she should hold her umbrella ?
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ANSWER
The described situation is shown in the given figure.
Here, v
c
= Velocity of the cyclist
v
r
= Velocity of falling rain
In order to protect herself from the rain, the woman must hold her umbrella in the direction of the relative velocity (v) of the rain with respect to the woman.
tanθ=v
c
/v
r
=10/30
θ=18
o
Hence, the woman must hold the umbrella toward the south, at an angle of nearly 18 with the vertical.
Answer:
well the answer is logical, when riding a bike the air provides great amount of friction as you travel at a much higher speed than when you walk, if you keep it vertically upwards it'll just fly away and you will get wet, but if you point it forwards, it wont and your view will be obstructed and you might meet wit an accident, so its better to not use umbrellas when on motorcycle, instead one should use a raincoat