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Questions  

A gun fires a bullet at a speed of 140m / s. If the bullet is to hit a target at the same level as the gun and at 1km distance, the angle projection

a
30°
b
75°
c
45°
d
53°

detailed solution

Correct option is B

R = 1000 m U = 140 m/sR=U2sin⁡2θg100×9.8=140×140sin⁡2θ2θ=30∘ θ=15∘,(90−15)=75∘also have the same range.

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