If air resistance is zero, the sum of potential and kinetic energy of a freely falling body will:

zero

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decrease

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increase

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remain constant

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Solution

The correct option is D remain constant
According to the law of conservation of energy, the total energy of a system is conserved. In case of free fall, the body possesses both kinetic and potential energy, which is conserved throughout the motion.

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Show that the sum of kinetic energy and potential energy(i.e., total mechanical energy) is always conserved in the case of freely falling body under gravity (with air resistance neglected) from a height h by finding it when (i) the body is at the top, (ii) the body has fallen a distance x, (iii) the body has reached the ground.

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If air resistance is zero, the sum of potential and kinetic energy of a freely falling body will:

The correct option is D remain constantAccording to the law of conservation of energy, the total energy of a system is conserved. In case of free fall, the body possesses both kinetic and potential energy, which is conserved throughout the motion.

The correct option is D remain constant
According to the law of conservation of energy, the total energy of a system is conserved. In case of free fall, the body possesses both kinetic and potential energy, which is conserved throughout the motion.