Answer:
The car's average acceleration is approximately 1.097 meters per second squared.
Acceleration is a fundamental concept in physics that describes the rate of change of an object's velocity with respect to time. In other words, it's how quickly an object's velocity is changing. Velocity itself is a vector quantity that includes both the speed of an object and its direction of motion. When an object's velocity changes, it means the object is either speeding up, slowing down, or changing direction.
Step-by-step explanation:
To find the average acceleration of the car, you can use the following formula:
Average Acceleration = Change in Velocity / Time
Given that the car accelerates from rest (initial velocity, u = 0) to a final velocity (v = 75 km/h) in a time of 19 seconds, we need to convert the velocities to the same units before calculating the change in velocity:
Initial velocity (u) = 0 km/h
Final velocity (v) = 75 km/h
Change in Velocity = Final Velocity - Initial Velocity
Change in Velocity = 75 km/h - 0 km/h = 75 km/h
Now, we need to convert the change in velocity to a more standard unit like meters per second (m/s), as the SI unit of acceleration is meters per second squared (m/s²).
1 km/h = 1000 m / 3600 s ≈ 0.2778 m/s
So, Change in Velocity = 75 km/h * 0.2778 m/s = 20.8333 m/s
Average Acceleration = Change in Velocity / Time
Average Acceleration = 20.8333 m/s / 19 s ≈ 1.097 m/s²
Therefore, To find the average acceleration of the car, you can use the following formula:
Average Acceleration = Change in Velocity / Time
Given that the car accelerates from rest (initial velocity, u = 0) to a final velocity (v = 75 km/h) in a time of 19 seconds, we need to convert the velocities to the same units before calculating the change in velocity:
Initial velocity (u) = 0 km/h
Final velocity (v) = 75 km/h
Change in Velocity = Final Velocity - Initial Velocity
Change in Velocity = 75 km/h - 0 km/h = 75 km/h
Now, we need to convert the change in velocity to a more standard unit like meters per second (m/s), as the SI unit of acceleration is meters per second squared (m/s²).
1 km/h = 1000 m / 3600 s ≈ 0.2778 m/s
So, Change in Velocity = 75 km/h * 0.2778 m/s = 20.8333 m/s
Average Acceleration = Change in Velocity / Time
Average Acceleration = 20.8333 m/s / 19 s ≈ 1.097 m/s²
Therefore, the car's average acceleration is approximately 1.097 meters per second squared.