A particle is projected from ground with initial speed u at angle θ with horizontal. If air friction is absent, then the average velocity of complete motion will be:
A
ucosθ
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B
usinθ
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C
2ucosθ
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D
2usinθ
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Solution
The correct option is Aucosθ
To know the average time traveled from being one point of height to other which is same from the ground determines the parabolic shapes of projectile.
Hence given as speed u at angle \theta and time as t1 and t1 . Horizontal component of the velocity be u cos \theta and the total displacement in travelling from t1 to t2 be,