Question

Worth 20 points

Please answer and show work with the conversion:

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

Answer 1

v final = v initial + at

a = acceleration, t= time

Vf = 30 + -4*3

=30-12 = 18 m/s