How large is the net force slowing the car?

A 1611.3 kg car is traveling at 20.1 m/s when

the driver takes his foot off the gas pedal. It

takes 4.7 s for the car to slow down to 20 m/s.

How large is the net force slowing the car?

Answer in units of N.How large is the net force slowing the car?
use F=ma

mass is given, as is an initial velocity, final velocity and a time from which you can compute the acceleration.

a= change velocity / change time

a=(20-20.1)/ 4.7= - 0.0213 m/s^2 the negative is significant in that it indicates the force is acting opposite the direction of motion.

now you have all info needed to find the force slowing the car

F=1611.3 kg (-0.0213 m/s^2)= - 34.28 N

good place to get teens comforters