What is the acceleration of an object if it goes from a velocity of + 25 m/s to rest in 5.0 s?

A. 5 m/s

B. + 5 m/s

C. 25 m/s

D. + 25 m/s

The answer should be - 5 m/s since it decelerated from 25 m/s to rest.

I'm not sure if you just forgot to add the negative sign to A

Acceleration = (change in speed) / (time for the change)

Change in speed = (speed at the end) - (speed at the beginning)

= (zero) - (25 m/s)

= - 25 m/s.

Acceleration = (-25 m/s) / (5 sec) = - 5 m/s². <===

None of the choices says this.