Question

energy required to accelerate a car from 10m/s to 20m/s compared with that required to accelerate ot from 0 to 10m/s is

Answer 1

According to the Equation, KE=(1/2)mv^2

Energy required to accelerate the car to 10m/s (given ‘E’)

Therefore mass=2E/100

Energy required to accelerate to 20m/s=(1/2)*(2E/100)*20*20=4E

energy required to accelerate from 10m/s to 20m/s = 4E-1E=3E

Therefore it is equal to 3 times the initial energy required.

Answer 2

right answer 3E.......