# A car moving at a speed of 70 kilometers per hour stops for 8 seconds. With what constant acceleration

December 29, 2020 | education

| **A car moving at a speed of 70 kilometers per hour stops for 8 seconds. With what constant acceleration does the car move when braking?**

Given:

V = 70km / h

t = 8c

To find:

a-?

SI:

V = 70000/3600 = 19.4m / s

Decision:

If the body moved uniformly throughout the entire path, i.e. with the same acceleration, then:

a = V / t = 19.4 / 8 = 2.65

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