Question

The capacity to do work is called:
(A) Energy
(B) Force
(C) Motion
(D) Velocity

Answer 1

Hint
The energy of a body is the ability of that body to do any kind of work. It can be of different forms and is found in many places. Energy cannot be created or destroyed but just can be changed from one form to another.

Complete step by step answer
In physics, energy is transferred from one body to another as a quantitative property. It has the ability to do work on a body or to heat up that body. From the law of conservation of energy we get to know that energy cannot be created or destroyed but can be only converted from one form to another. So therefore, energy exists in nature in a number of forms. A few common forms of energy are kinetic energy of a moving body, potential energy of a body with respect to its position, elastic energy, thermal energy, etc. So therefore, from the given question, the ability of a body to do work is called energy.
Hence option (A), will be correct.

Additional Information
In the given question, the other terms in the option given are,
Force- It is the kind of interaction which when unopposed may change the velocity, direction or the shape of a body that it is applied on.
Motion- It is a kind of phenomenon due to which a body changes its position with respect to time.
Velocity- The rate of change of the position of a body with respect to time in a certain frame of reference is called velocity.

Note
All kinds of living organisms also need energy to stay alive. We get this energy from our food. Other important sources of energy for our human civilization are the energy derived from fossil fuels or the nuclear fuels.