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Eamcet Physics
1 st Year : Unit 2.7 ( Kinematics ) - Oblique Projection

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Q.

A projectile has initially the same horizontal velocity as it would acquire if it had moved from rest with uniform acceleration of 3sm-2 for 0.5 minutes. If the maximum height reached by it is 80m then the angle of projection is [g = 10ms-2]

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Correct choice: C

Explanation:

V = at = 30 × 0.5 × 60
V = 90 ms-1
but u cosθ = 90

u2 sin2 θ = 1600
u sin θ = 40
u cos θ = 90
Tan θ = 4/9
θ = tan-1(4/9)
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