Explanation
Step 1-Momentum of body
Here, body is at rest. So, it is not in motion means its speed and velocity both will be zero. Similarly, momentum is product of mass and velocity, so its value will be also zero.
Step 2-Energies of body
Kinetic energy of body which depends on velocity is also zero but it will have some potential energy which is given by the formula,
U=m g h, where, m is mass, h is the height of body and g is the acceleration due to gravity.
So, its potential energy will not be zero.
And total energy is sum of both kinetic energy and potential energy. Which will be also non-zero.
So, a body at rest will have some energy.
Hence, option A is the correct answer.
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