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A person walking at 4m/s.find rain drops falling slant wise with a speed 4m/s at an angle of 30⁰ with vertical show that the actual speed of the rain drops is 4m/s |
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Answer» tion:The velocity of rain with RESPECT to the man=4m/s at an angle 30° with vertical.Also, it is given that the velocity of the man with respect to GROUND=4m/sThe velocity of rain wrt man+velocity of man wrt ground = velocity of rain wrt ground i.e ACTUAL velocity of the rain(by using and applying triangle law of vector addition)So, velocity of rain wrt ground= 4 2 +4 2 +2(4)(4)cos120 = 16+16+32(−0.5) = 32−16 = 1 6=4m/sTherefore the actual velocity of the rain with respect to ground=4m/s |
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