Question

this isnt really physics but.. A truck travels at 40 m/s and slows down to 10 m/s in 5 seconds. What is the acceleration of the truck? Show formula, work, and units for each variable. please help

Answer 1

Its physics,

well you will have to use the kinematic equations.
the one your are going to want to use is:
v final = v initial + a(t final- t initial)

you will plug in your values so it looks like:

10 m/s = 40 m/s + a (0- 5)

Then solve for a:

.25 = a(-5s)
a= -0.05 m/s^2

Answer 2

I did the math wrong, sorry.

Instead of dividing 10 by 40 I should have subtracted so it would look like this:

10 m/s = 40 m/s + a(5-0 s)
-30 m/s = a(5 s)

-6 m/s^2 = a