A car travels in a straight line for 4.5 h at a constant speed of 61 km/h .

What is its acceleration?
Answer in units of m/s2.

constant speed? zero acceleration.

13.5555555555555555

A car travels in a straight line for 3.2 h at a constant speed of 92 km/h .

What is its acceleration? Answer in units of m/s2.

0 m/s2

To find the acceleration of the car, we need to use the basic equation of accelerated motion:

acceleration = change in velocity / change in time

Since the car is traveling at a constant speed, the change in velocity is zero. Therefore, the acceleration of the car is also zero.

In this case, the car maintains a constant speed of 61 km/h for 4.5 hours. Since there is no change in velocity, there is no acceleration.