Q.

A ball is thrown upwards and returns to the ground describing a parabolic path. Which of the following quantities remains constant ?

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a

Kinetic energy of the ball

b

The speed of the ball

c

The vertical component of velocity

d

The horizontal component of velocity

answer is D.

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Detailed Solution

When a body is projected under gravity the acceleration of the body is acting along vertical direction hence vertical velocity changes but horizontal velocity remains constant.
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