What is a car’s acceleration if it increases its speed from 5 m/s to 20 m/s in 3 s? a: 5 m/s2 b: 15 m/s2 c: -15 m/s2 d: 10 m/s2

The formula for acceleration is:

a = (Vf - Vi) / t

Where:

a = acceleration

Vf = final velocity

Vi = initial velocity

t = time

(Note that the formula can also be written using V, Velocity, and V0, Velocity Nought/zero. Its the same as final and initial velocity, with initial being nought)

We have all we need to do the problem now:

Vf = 20 m/s

Vi = 5 m/s

t = 3s

a = (20 - 5) / 3

a = 5 m/s^2

we need to know the time interval during which the force acts. impulse of force = momentum change

more than, less

less than, more