The enrgy The energy reqduired to accelerate a car from 10 m/s to 20 m/s compared with that required to accelerate from 0 to 10 m/sec in the same interval of time overcoming same resistance is :

Options

A. twice
B. 4 times
C. 3 times
D. same

Answer

c

Explanation

`(W_(1))/(W_(2))=(1/2m(v_(2)^(2)-v_(1)^(2)))/(1/2m(v_(2)^(2)-v_(1)^(2)))=(20^(2)-10^(2))/(10^(2)-0^(2))=(300)/(100)`