Ann is driving down a street at 54 km/h. Suddenly a child runs into the street.
If it takes Ann 0.722 s to react and apply the brakes, how far will she have moved before she begins to slow down?
Answer in units of m
While John is traveling along an interstate
highway, he notices a 142 mi marker as he
passes through town. Later John passes a
102 mi marker.
What is the distance between town and
John’s current location?
Answer in units of mi
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To find the distance Ann will have moved before she begins to slow down, we need to calculate the distance she travels during her reaction time.
First, let's convert Ann's speed from km/h to m/s:
54 km/h * (1 h / 3600 s) * (1000 m / 1 km) ≈ 15 m/s
Now, we know Ann's initial speed is 15 m/s and the time it takes her to react is 0.722 s. To find the distance traveled during her reaction time, we can use the formula:
Distance = Speed * Time
Distance = 15 m/s * 0.722 s ≈ 10.83 m
Therefore, Ann will have moved approximately 10.83 meters before she begins to slow down.