Physics, asked by rahulvats3615, 10 months ago

A body is projected at an angle of 30° to the horizontal with speed 30 m/s. What is the angle with the horizontal after 1.5 seconds? Take g = 10 m/s².
(a) 0°
(b) 30°
(c) 60°
(d) 90°

Answers

Answered by mathsdude85

Answer is option A

answer is in attachment

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Answered by Anonymous

Answer:

A) 0°

Explanation:

Projection angle of the body = 30° ( Given)

Speed = 30 m/s. ( Given)

Horizontal time = 1.5 sec ( Given)

Along the vertical the equation will be - v = u + at

v Sinθ’ = u Sinθ - gt

vSinθ’ = 30×1/2 - 10×1.5

vSinθ’ = 15 - 15 = 0

Sinθ’ = 0

θ’ = 0°

Therefore, the angle made by the velocity vector with horizontal after 1.5s is 0°.

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