Question

A car slows from 22m/s to 3m/s with a constant acceleration of –2.1m/s2. How long does this require?

Answer 1

`"9.05 s"`

Explanation:

`v = u + at`

Use above equation to find time (`t`)

`t = (v - u)/a = ("3 m/s "-" 22 m/s")/(-"2.1 m/s"^2) = "9.05 s"`