Does the kinetic energy of a car change more when it speeds up from 10 to 15 m/s or from 15 to 20 m/s? Explain.

Answer 1

10 to 15 m/s:
KE1 = 0.5M*V1^2 = 0.5M*10^2 = 50M.
KE2 = 0.5M*V2^2 = 0.5M*15^2 = 113M.
KE2-KE1 = 113M - 50M = 63M. = Change in KE.

15 to 20 m/s:
KE1 = 0.5M*15^2 = 113M.
KE2 = 0.5M*20^2 = 200M.
200M - 113M = 87M. = Change in KE.