Question

If a car starting at rest accelerates at 2.5 m/s2 for 9.0 seconds how fast will it be going?

Answer 1

v=22.5 m/s

Step-by-step explanation:

Given that,

Initial speed, u = 0

Acceleration, a = 2.5 m/s²

Time, t = 9 s

We need to find how fast the car is moving i.e. its final speed. So,

`v=u+at`

u = 0

So,

v = at

v = 2.5 m/s²× 9

v=22.5 m/s

So, the final speed of the car is 22.5 m/s.