Question

Kinetic energy of a body depends on its:
A. Position
B. Velocity
C. Shape
D. Colour

Answer 1

Hint:The energy a moving body has is known as kinetic energy. Consequently, a body in motion will have a mass and a velocity. Additionally, a body's velocity might change depending on the frame of reference.

Formula used: Kinetic Energy (K.E)$ = \dfrac{1}{2}m{v^2}$



Complete answer:
The equation for the kinetic energy of a body of mass m travelling at a velocity v is well known to us all and is as follows:
Kinetic Energy (K.E)$ = \dfrac{1}{2}m{v^2}$
It is obvious from the mentioned equation that a body's kinetic energy is dependent on both its mass, m, and the square of its velocity, v.
A body's velocity varies depending on the frame of reference. Imagine that person B is on a bus when he notices that person A is seated in front of him. B says that A is at rest. However, a person C standing on the ground and gazing at person A will see that person travelling at the same speed as the bus. As a result, the B and C have differing perceptions of the speed of the individual A.
As a result, the kinetic energy related to A according to B and C will likewise differ. Therefore, we can conclude that a body's kinetic energy depends on its frame of reference.
Therefore, a body's mass, velocity, and frame of reference all affect its kinetic energy.
So, correct choice is (B)



Note:The change in kinetic energy associated with the body accounts for the energy involved in changing the velocity of a mass m body from v1 to v2. (This is only relevant if the body is being affected by a conservative force.)
$W = \dfrac{1}{2}m{v_1} - \dfrac{1}{2}m{v_2}$

The sum of a body's potential and kinetic energy, or total energy, is independent of the frame of reference.