Question

Complete the following sentence:
The kinetic energy of a body is the energy by virtue of its ____________.
A) Force
B) Motion
C) Roughness
D) All the above

Answer 1

Hint: - The different forms of energy can be categorized under potential and kinetic energy. These two depend on position or motion of the body. We have to analyze how the kinetic energy can be related.

Complete Step by step solution:
 The work needed for a body to accelerate from the rest to a velocity can be termed as the kinetic energy.
The expression for kinetic energy is given as,
$K.E = \dfrac{1}{2}m{v^2}$
Where, $m$ is the mass, $v$ is the velocity of the body. This is the translational kinetic energy of the body. That is when it moves from one place to another.
Kinetic energy is also called the movement energy.
From the expression it is clear that the kinetic energy is proportional to the velocity of the body which is related to the motion. It is the work done to bring a body from rest to the velocity. The kinetic theory can be related to the momentum also. If a force is done on a body to speed up its motion, then the body gains the kinetic energy. The motion also depends on the mass also.
The kinetic energy of a body is the energy by virtue of its motion.
The answer is option B.

Note: The kinetic energies can be a kind of translation that is moving from one place to another, vibrational or the rotation about an axis. When a body gains kinetic energy it will maintain it. When the velocity changes the kinetic energy will change.