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A body is projected downwards at angle 30 to horijontal and velocity 9.8 from top oftower 29.4 m high how long it take befores strike ground
initial vertical velocity= usin30 = 4.9m/svertical distance traversed= 29.4mSo,h=ut + 1/2gt229.4=4.9*t +4.9t2on solving we gett2 + t – 6 = 0 (on solving quadratic equation)t=3 seconds.THANK YOU(please note I have taken 9.8m/s2 as accleration due to gravity for simplicity)
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