A car that is moving with constant velocity has zero acceleration. Velocity and acceleration are vector quantities, meaning they have both magnitude and direction. This does not mean that a car with constant speed does not apply forces on other objects, though. Newton’s second law of motion states that a net force applied to a moving object will cause it to change its velocity.
For example, if a car is driving down the road at a constant speed of 100 miles per hour and suddenly turns left into a residential neighborhood, it will apply a force to the street that will slow it down from its current constant speed. This is because the force of friction that is created between the tire and the road will oppose the car’s current velocity, which will make it slow down and eventually stop.
The car’s acceleration will also be affected by the road’s surface material, wind resistance, and its fuel supply. If the car runs out of gas, it will no longer have the power to maintain its constant speed.
The best way to determine the car’s acceleration is by measuring its speed using a speedometer or GPS device. Then, draw a graph that shows the distance traveled over time. Record the value for distance on the x-axis and the value of time (in seconds) on the y-axis. Label the axes and scale your graph appropriately. Repeat the experiment 2 times to ensure that the data is accurate.