The driver of a car traveling at a speed of 25.5 m/s slams on the brakes and comes to a stop in 3.4 s. if we assume that the car's speed changed at a constant rate (constant net force), find the following. what was the car's average speed during this 3.4 s interval? m/s
how far did the car go in this 3.4 s interval? m

(a). The average speed of the car is 12.75 m/s

(b). The distance is 43.35 m.

Explanation:

Given that,

Initial speed = -25.5 m/s

Final speed = 0

Time = 3.4 s

(a). We need to calculate the average speed

Using formula of average speed

Put the value into the formula

(b). We need to calculate the acceleration

Using equation of motion

We need to calculate the distance

Using equation of motion

Hence, (a). The average speed of the car is 12.75 m/s

(b). The distance is 43.35 m.

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