Question

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

acceleration is the rate at which velocity changes ...

Answer 2

yeah...and...?

Answer 3

so apply the changes ...

what is the change in the velocity?

Answer 4

is it B?

Answer 5

B is close, but no

since we are slowing down, we have a negative acceleration.

otherwise it was fine.

25 to 0 is a change of -25

and in 5 seconds is

-25/5 = -5

Answer 6

oh okay...thanks

Answer 7

good luck

Answer 8

thanks.