Question

A car can accelerate from rest to a speed of 28 m/s in 20 s. What is the average acceleration of the car

Answer 1

Formula for acceleration:

`a=(V^f-V^I)/(t)`

acceleration(measured in m/s^2) = Final velocity(measured in m/s) - Initial velocity(measured in m/s) / time(measured in seconds)

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Given:

`V^I=0m/s` (rest)

`V^f=28m/s`

`t=20s`

`a=?`

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Finding acceleration:

`a=(V^f-V^I)/(t)`

`a=(28-0)/(20)`

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Answer:

`\boxed{a=1.4m/s^2}`