Question

A car traveling at 50 m/s comes to a stop in 5 seconds. What is the acceleration of this car? Show all work and units. *

Answer 1

Known info;
v1/vi(starting velocity) = 50m/s
v2/vf (final velocity) = 0m/s
t(time) = 5second

Unknown info;
a=?

Formula;
v2 = v1 + at
0 = 50 + 5a (move 50 to other side to let 5a alone)
-50 = 5a (divide by 5 to let a alone and solve)
-10 m/s2 = a (answer)

Answer 2

-10 m/s²

Explanion:

(0 m/s - 50 m/s) ÷ 5 seconds

You subtract the original speed from the final speed, (to get negative 50), then divide that by 5 seconds.

Hope this helps! :)