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Questions  

The maximum horizontal range of projectile is 400m . The maximum height attained it will be

a
100 m
b
200 m
c
400 m
d
800 m

detailed solution

Correct option is A

Horizontal range is maximum, whenθ=450 Horizontal range, R=u2 sin 2θ/g ∴  400=u2sin2×450g or u2g=400           …(i)Maximum height,H=u2sin24502g=4002×12=100 m .

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