Question

What is an object’s acceleration if it is moving at 40 m/s and comes to a stop in 5 s?

35 m/s 2

8 m/s 2

–8 m/s 2

200 m/s2

Answer 1

- 8 m/s^2

Step-by-step explanation:

given:

Final velocity = 0

initial velocity = 40

time = 5 seconds

we can use the equation vf = vi + at

hence,

0 = 40 + 5a

-40 = 5a

a = -8 m/s^2