A driver starts his parked car and within 5 seconds reaches a speed of 60km/h, as he travels east. What is his acceleration?

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28-09-2014
Physics

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A driver starts his parked car and within 5 seconds reaches a speed of 60km/h, as he travels east. What is his acceleration?

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AL2006 AL2006 · Answer 1 · 2014-09-28T01:03:47-04:00

Acceleration =
(change in speed) / (time for the change)
and the direction of the change.

Acceleration = (60 - 0) km per hour / 5 sec = 12 km per hour per second, east.

I hear teachers all over the country complaining about that ugly unit.
It has to be changed to a more familiar unit of acceleration.

(12 km/hour) x (1 hour/3600sec) = 12,000/3600 = 3-1/3 meter/sec.

His acceleration is 3-1/3 meters per second² .