Q.

In a projectile motion the velocitya) is always perpendicular to the accelerationb) is not always perpendicular to the accelerationc) is perpendicular to the acceleration for one instant onlyd) is perpendicular to the acceleration for two instants.

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a

a & b are correct

b

b & c are correct

c

c & d are correct

d

a & d are correct

answer is B.

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Detailed Solution

Acceleration of projectile is vertically downward. Velocity of a projectile (for oblique projection) is horizontal only at the highest position.So Statement -(b) is correct and Statement - (c) is correct
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