1. If you are driving in a car and you go from 0 m/s to 80 m/s in 20 seconds. What is your
acceleration?

The acceleration is the difference of speed: final speed - initial speed, all divided by t.

So:

(80m/s - 0m/s) / 20s = (80m/s)/20s = 4m/s^2

electrical potential energy =0.072 j

explanation:

electrical potential energy is given by

u= q δv

q= charge=6 c

δv= potential difference and is given by

δv= e d

e= electric field

d= distance=5 mm=0.005 m

δv=2.4 (0.005)=0.012 v

now electric potential energy= u= q δv

u=6 (0.012)

u=0.072 j