The two cars accelerate to 100 km / h in 10 and 15 seconds, respectively.

The two cars accelerate to 100 km / h in 10 and 15 seconds, respectively. Assuming the movement is uniformly accelerated, determine the accelerations with which the cars are moving.

Acceleration of vehicles with uniformly accelerated movement:

a = (V – V0) / t, where V is the final speed (V = 100 km / h = 100 * 1000/3600 = 27.78 m / s), V0 is the initial speed of cars (cars were accelerated from a standstill, V0 = 0 m / s), t – acceleration time.

Acceleration of the first car (t1 = 10 s):

a1 = V / t1 = 27.78 / 10 = 2.778 m / s2.

Acceleration of the second car (t2 = 15 s):

a2 = V / t2 = 27.78 / 15 = 1.852 m / s2.

Answer: The acceleration of cars is respectively 2.778 m / s2 and 1.852 m / s2.