If speed of a body is increased by 1 percent...what is the change in its kinetic energy?
1 Answer
May 14, 2018
the change in K.E. = 2 %
Explanation:
Let the initial speed is v m/s .
a change of 1% in speed will mean the new velocity
will be = v + 1% of v = v + (1/100)v = v + 0.01 v
so the kinetic energy before the change
after the change of speed
the K.E = E' = (1/2).m. { v.(1.01)}^2
=
therefore the kinetic energy will change by 2%