Question

The energy required to accelerate a car from 10 m/s to 20 m/s is how many times the energy required to accelerate the car from rest to 10 m/s?

• A. Equal
• B. 4 times
• C. 2 times
• D. 3 times

Answer 1

Answer: (D)

3 times

Answer 2

DKE = $\frac { 1 } { 2 }$m $\left( V _ { f } ^ { 2 } - V _ { i } ^ { 2 } \right)$