Question

Please answer and show work

A car moving with a velocity of 30m/s has a constant acceleration of -4m/s? What will be the velocity 3 seconds later?
-12m/s
b. 18m/s
C. 42m/s
d. 90m/s

Show Calculation:

Answer 1

v2 = v1 + at

a acceleration

t time

v2 final velocity v1 initial velocity

v2 = 30 + -4*3 =

30 -12 = 18m/s