Question

**WILL MEDAL***
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/s2

B.
+5 m/s2

C.
-25 m/s2

D.
+25 m/s2

Answer 1

Use the formula v=u-at, where v and u are final and initial velocities, respectively, a is acceleration and t is time, making a subject of the formula is (v-u)/t or (0-25)/5=-5m/s^2

Answer 2

Answer is A.

Answer 3

Thanks.