The kinetic energy of the object is affected in that, The kinetic energy is quartered.
The energy an item has as a result of motion is known as kinetic energy in physics. It is described as the effort required to move a mass-determined body from rest to the indicated velocity. The body holds onto the kinetic energy it acquired during its acceleration until its speed changes.
We are told that kinetic energy, K, of an object varies jointly with its mass, m, and the square of its velocity, v. Thus;
K = mv²
Now, mass is same but velocity halved. Thus, we now have;
K = m(v/2)²
K = ¹/₄mv²
Thus, the kinetic energy is quartered.
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