A truck covers 40.0m in 8.50s while uniformly slowing down to a final velocity of 2.80m/s. (a)find the truck's original speed. (b)find its acceleration.

Question

jfraser · Answer

use one (or more) of the equations of kinematic motion. Find the equation that has the one missing piece, $V_0$

amistre64 · Answer

hmmm, im thinking along the lines of

2.8 = -a(8.5)+v 

-40 = -a(8.5)^2/2 + v(8.5)

amistre64 · Answer

prolly have some negative mixed up in that

anonymous · Answer

find the truck's original speed ? but for acceleration you can find Difference of the first V and the second V because the acceleration means that and then find the mean of them .
40 m/8.5 s = 4.7m/s
4.7/2.8=1.7

petiteme · Answer

I was checking my questions and saw that I haven't answered you guys. Sorry :( And thankyou :D