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Questions  

The maximum height reached by a projectile is 4 meters. The horizontal range is 12 meters. Velocity of projection, in ms-1, is (g is acceleration due to gravity)

a
g25
b
g23
c
1382
d
15g2

detailed solution

Correct option is A

4H=R tan ⁡θ⇒4×4=12×tan ⁡θ⇒tan ⁡θ=43Given  Hmax=u2sin2⁡θ2g=4⇒u2×45×45×12×10=5u2=125⇒u=55m=5g2

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Similar Questions

Assertion : When the velocity of projection of a body is made n times, its time of flight becomes n times.

Reason : Range of projectile does not depend on the initial velocity of a body.


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