69. Rain is falling vertically with a speed of 20 ms relative to air. A person is running in the rain with a velocityof 5 ms and a wind is also blowing with a speed of 15 ms (both towards east). Find the angle with thevertical at which the person should hold his umbrella so that he may not get drenched.
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69 o.o
here's your answer mate ☺️
Velocity of rain =vr=20j=vr=20j
Velocity of man =vm=5i=vm=5i
Velocity of wind =15i=15i
Velocity of rain with respect to man when wind is blowing is
=15i−5i+20j=15i−5i+20j
=20j+10i=20j+10i
tanθ=2010tanθ=2010
=2=2 from the horizontal.
Hence the person should hold is umbrella at αα (with vertical)
=tan−1(12)=tan−1(12)
hope it helps
mark as brainliest ✌️✌️✌️
question no. 69 (@_@)
here's your answer mate ☺️
Velocity of rain =vr=20j=vr=20j
Velocity of man =vm=5i=vm=5i
Velocity of wind =15i=15i
Velocity of rain with respect to man when wind is blowing is
=15i−5i+20j=15i−5i+20j
=20j+10i=20j+10i
tanθ=2010tanθ=2010
=2=2 from the horizontal.
Hence the person should hold is umbrella at αα (with vertical)
=tan−1(12)=tan−1(12)
hope it helps
mark as brainliest ✌️✌️✌️
question no. 69 (@_@)
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