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Q.

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

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a

53°

b

45°

c

30°

d

75°

answer is B.

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Detailed Solution

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

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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