Since kinetic energy is a value, it can exhibit change. It depends on the mass and velocity of an object, and any change will change the K.E. of the body.
A change in kinetic energy means the difference in the values of K.E. of a body, with the mass’m’ and velocity ‘v,’ at two different points. Normally, this difference is calculated at the starting point and then at the ending point.
To calculate the change in K.E., you can use the following formula:
ΔKE = 1/2*m*(v_f2 – v_i2)
In this formula:
ΔKE is the change in K.E.
m is the object’s mass
v_f is the final velocity and
v_i is the initial velocity.
From this formula, it is clear that you will need to calculate or know the values of mass, initial, and final velocity. When you have these values, you can put them in the formula and get the required answer, i.e., the change in kinetic energy.