Answer:
To calculate the acceleration of a car that slows down from 80 km/h to a stop in 20 s, we can use the following formula:
acceleration = (final velocity - initial velocity) / time
The initial velocity of the car is 80 km/h, which is equal to 22.22 m/s (since 1 km/h = 0.2778 m/s).
The final velocity is 0 m/s, since the car comes to a stop. The time taken to stop is 20 s.
Substituting these values into the formula, we get:
acceleration = (0 m/s - 22.22 m/s) / 20 s
acceleration = -22.22 m/s / 20 s acceleration = -1.11 m/s^2
The negative sign indicates that the car is decelerating or slowing down. Therefore, the acceleration of the car is -1.11 m/s^2.
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Answer:
To calculate the acceleration of a car that slows down from 80 km/h to a stop in 20 s, we can use the following formula:
acceleration = (final velocity - initial velocity) / time
The initial velocity of the car is 80 km/h, which is equal to 22.22 m/s (since 1 km/h = 0.2778 m/s).
The final velocity is 0 m/s, since the car comes to a stop. The time taken to stop is 20 s.
Substituting these values into the formula, we get:
acceleration = (0 m/s - 22.22 m/s) / 20 s
acceleration = -22.22 m/s / 20 s acceleration = -1.11 m/s^2
The negative sign indicates that the car is decelerating or slowing down. Therefore, the acceleration of the car is -1.11 m/s^2.