Two identical cars each increased their speed by 10 km / h, but one in 20 seconds and the other in 40 seconds

Two identical cars each increased their speed by 10 km / h, but one in 20 seconds and the other in 40 seconds, which of the cars was affected by a large force during acceleration.

Initial data: ΔV (change in vehicle speed) = 10 km / h; t1 (acceleration time of the first car) = 20 s; t2 (acceleration time of the second car) = 40 s; m1 = m2 = m (vehicle mass).

SI system: a = 10 km / h = 2.78 m / s.

1) Acceleration of cars: ΔV = V – V0 = a1 * t1 and a1 = ΔV / t1 = 2.78 / 20 = 0.139 m / s ^ 2; a2 = 2.78 / 40 = 0.0695 m / s ^ 2.

2) Forces acting on cars: F1 = m * a1 = 0.139m N and F2 = m * a2 = 0.0695m N.

Answer: There was a great force on the first car.