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Questions  

A particle is projected from a horizontal plane with a velocity of 82m/s at an angle. At highest point, its velocity is found to be 8 m/s. Its range will be g=10m/s2

a
12.8 m
b
6.4 m
c
3.2 m
d
4.8 m

detailed solution

Correct option is A

Velocity at the highest point of a projectile ucosθ =8m/s here u=82  so θ=450range =u2sin2θg=82210sin 900=12.8

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