1) what would the average acceleration be for a car at a stoplight that speeds up to 20 m/s in 10 seconds (in m/s^2) 2) imagine that a car traveling at 100 m/s must slam on the brakes to avoid hitting a raccoon. if it takes 4 seconds for the car to slow down to a stop, what is its acceleration (in m/s^2)

Part a)

a = 2 m/s/s

Part b)

a = - 25 m/s/s

Explanation:

As we know that the average acceleration id defined as the rate of change in the velocity of the object

so here it is given by formula

now we know that

now we have

Part b)

here car is travelling with speed 100 m/s

now driver slams brakes and car finally stop in t = 4 s

so the average acceleration is given as

now we know that

now we have

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