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A car is going 60.0 mi/h and has to stop in 6.0 seconds. What is the car’s acceleration?

User Liam Horne
by
6.4k points

2 Answers

4 votes

The driver must accelerate the car at the average rate of

- 10 mile / hour-second

for 6 seconds .

User PatrickS
by
5.9k points
3 votes

Step-by-step explanation:

Convert mi/h to ft/s.

60.0 mi/h × (5280 ft/mi) × (1 h / 3600 s) = 88.0 ft/s

Find the acceleration.

a = Δv / Δt

a = (0 ft/s − 88.0 ft/s) / 6.0 s

a = -14.7 ft/s²

User Syed Ali Salman
by
6.1k points