3. (a) What energy is expected in pulling a cart of
mass 800kg on the level at a steady rate over a
distance of 1.2km, if the coefficient of friction
between the wheels and the road is 0.25?
(b) What was the power required if it took 20
minutes to do the job. What was the horse
power. (g = 10 ms

would be false hope this out

pecialized keyboards

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