A body is falling from a height h. After it has fallen from a height h2, it will possess (a) only potential energy (b) only kinetic energy (c) half potential and half kinetic energy (d) more kinetic and less potential energy

Answer: (c) half potential and half kinetic energy

When the body is at height h, its potential will be a hundred per cent and kinetic energy will be zero. In the same way, when the body reaches the ground its potential energy will be zero and kinetic energy will be maximum. At height h/2 both potential energy and kinetic energy of the body will be half.

Kinetic energy

Kinetic energy is a form of energy possessed by an object due to its motion. The formula used to express the kinetic energy is,

K. E = 1/2 mv2

Example: Vibrational energy

Potential energy

Potential energy is a form of energy possessed by an object due to its position or state. The formula used to express the potential energy is,

P.E = m × g × h

Example: Gravitational potential energy

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