Question

A car starting from rest accelerates at a rate of 8.0 m/s. What is its final speed at the end at 4.0 seconds?

Answer 1

`v = 32m/s`.

Explanation:

I will assume that you mean that the acceleration is `8.0` `m/s^2`, as `8.0m/s` is a value for velocity, not acceleration.
Here, we use the formula `v = u +at`, where `v` is the final velocity, `u` is the initial velocity, `a` is the acceleration, and `t` is time. Let's substitute values, then:
`v = u + at`,
`v = 0 + 8.0 * 4.0`
`v = 32`,
`v = 32m/s`.

Hope it Helps! :D .