As you drive in your car at 22.5 mi/h, you see a child's ball roll into the street ahead of you. You hit the brakes and stop as quickly as you can. In this case, you come to rest in 2 s. How far does your car travel as you brake to a stop? (Use: 1 mile = 1600 m, 1 h = 3600s)

Question

Robert

Physics

9 November, 17:09

As you drive in your car at 22.5 mi/h, you see a child's ball roll into the street ahead of you. You hit the brakes and stop as quickly as you can. In this case, you come to rest in 2 s. How far does your car travel as you brake to a stop? (Use: 1 mile = 1600 m, 1 h = 3600s)

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Jennifer · Answer 1

Speed of car = 22.5miles/hr

U=22.5miles/hour

Applied brake and come to rest

Final velocity, = 0

t, = 2sec

Given that,

Speed=distance / time

Then,

Distance, = speed, * time

Converting mile/hour to m/s

Given that

Use: 1 mile = 1600 m, 1 h = 3600s

22.5miles/hour * 1600m/mile * 1hour/3600s

Therefore, 22.5mile/hour=10m/s

Using speed = 10m/s

Distance = speed * time

Distance=10*2

Distance, = 20m

The distance travelled before coming to rest is 20m.