Question

Mr. Henderson's imaginary) Porsche accelerates from 20 m/s to 60 m/s in 4 seconds. Its acceleration is

Answer 1

`a = 10`

Explanation:

Given

`Initial\ Velocity\ (u) = 20m/s`

`Final\ Velocity\ (v) = 60m/s`

`Time = 4s`

Required

Determine the acceleration

This question will be answered using the first equation of motion.

`v = u + at`

Substitute values for v, u and t

`60 = 20 + 4 * a`

`60 = 20 + 4 a`

Subtract 20 from both sides

`60 - 20= 20 -20 + 4 a`

`40= 4 a`

Divide both sides by 4

`10 = a`

`a = 10`

Hence, the acceleration is 10m/s/s