A car exiting the highway moving at 40 m/s slows down at the rate of 4 m/s2 to a final velocity of 20 m/s. ?

A car exiting the highway moving at 40 m/s slows down at the rate of 4 m/s2 to a final

velocity of 20 m/s. Calculate the distance the car travels while braking.

A. 2.5 m

B. 5 m

C. 50.625 m

D. 150 m

E. 300 m

1 Answer

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  • 1 month ago

    The change in speed is 20 m/s. Each second, the car slows down by 4 m/s.  So it takes ____ seconds to go from 40 m/s to 20 m/s.

    The average speed is the average of 40 and 20, so the average is ____.

    The distance travels is (time to slow down) * (average speed).

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