4. The distance needed to stop a car varies direct
the square of its speed. It requires 120m to stop a car
at 70kph. What distance is requred to stop a car at
80kph?
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4. The distance needed to stop a car varies direct
the square of its speed. It requires 120m to stop a car
at 70kph. What distance is requred to stop a car at
80kph?
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Answer:
137.14m
Step-by-step explanation:
x=m
y=kph
kx=y
k120=70
k=7/12
7x/12=80
x=960/7
here charm