A riffle shoots a bullet with a muzzle velocity 100m/s at a small target 200m away.How high above the target must the riffle be aimed do that the bullet will hit the ground?
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time taken to reach by bullet 200m away from initial position is t = 200/100 = 2sec.
now, here vertical initial speed = 0
vertical acceleration, a = acceleration due to gravity
so, use formula, S = ut + 1/2at² for vertical component.
s = 0 + 1/2 at²
s = 0 + 1/2 × 10 × 2²
s = 20m
hence, 20m above the target must the riffle be aimed do that the bullet will hit the ground
now, here vertical initial speed = 0
vertical acceleration, a = acceleration due to gravity
so, use formula, S = ut + 1/2at² for vertical component.
s = 0 + 1/2 at²
s = 0 + 1/2 × 10 × 2²
s = 20m
hence, 20m above the target must the riffle be aimed do that the bullet will hit the ground
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