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

Kinetic energy of the ball

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Speed of the ball

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Horizontal component of velocity

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Vertical component of velocity

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Solution

The correct option is B Horizontal component of velocity
only the horizontal component remains constant as there is no component of acc. in a horizontal direction.

The g acceleration due to gravity acts downwards hence there is no acceleration in a horizontal direction, the velocity changes in a vertical direction as goes up and down while in horizontal it goes only forward.

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