Home » UPSC CDS-2 » An object is dropped from a height onto the floor. Which one of the fo

An object is dropped from a height onto the floor. Which one of the fo

June 1, 2025 by rawan239

An object is dropped from a height onto the floor. Which one of the following remains uniform as it falls ?

Its acceleration

Its momentum

Its kinetic energy

Its potential energy

This question was previously asked in

UPSC CDS-2 – 2022

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When an object is dropped from a height and falls towards the floor, its acceleration remains uniform (assuming negligible air resistance). This is because the acceleration is due to gravity, which is approximately constant near the Earth’s surface.

Acceleration due to gravity (g) is approximately 9.8 m/s² near the Earth’s surface and acts downwards. For a freely falling object (with negligible air resistance), this acceleration is constant.

As the object falls, its velocity increases (due to uniform acceleration), its momentum (mass x velocity) increases, and its kinetic energy (1/2 x mass x velocity²) increases. Its potential energy (mass x gravity x height) decreases as its height decreases. Only the acceleration due to gravity remains constant.

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