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A projectile shot an angle of 60° above the horizontal strikes a wall 30 m away at apoint15 m above the point of projection .
(a) Find the speed of projection
(b) Find the magnitude of velocity of the projectile when it strikes the wall
Can you tell me is there any chrges of putting queries?
dear manoj
use the formula y=xtanθ-gx2/(2u2cos2θ)
here y= 15m
x=30 m
θ=60
then calculate u
u=21.85 m/s
magitude of the velocity when it hit the wall can be calculated as
v2=u2-2gh
=(21.85)2-2*9.81*15
v=13.53 m/s
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