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Question
Rain is falling downwards with a velocity of 3 km/h. A man walks in the rain with a velocity of 4 km/h. Raindrops will appear to be falling on the man with a velocity of
Rain is falling downwards with a velocity of 3 km/h. A man walks in the rain with a velocity of 4 km/h. Raindrops will appear to be falling on the man with a velocity of
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Solution
The correct option is D 5 km/h
Let →vr and →vm be the velocities of rain and man respectively.
→vr=−3^j and −→vm=4^i
∴ −−→vrm=→vr−−→vm=−3^j−4^i
⇒ |−−→vrm|=√32+42=5 km/h
Let →vr and →vm be the velocities of rain and man respectively.
→vr=−3^j and −→vm=4^i
∴ −−→vrm=→vr−−→vm=−3^j−4^i
⇒ |−−→vrm|=√32+42=5 km/h
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