a particle is projected at some angle with a velocity of 50 m s crosses a 20 m high wall after 4 s from the time of projection . the angle of projection is
rayannawilder2000:
Hey! I want to know that whether the answer of this question is (sin)-1 2/5 or not?
the answer is 30 degree
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S=ut+ 1/2gt2 S= usinøt-1/2gt2 20=50sinø(4)-1/2*10*4*4 On solving we get sinø=1/2 Ø=30°
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