3. what average net force is required to stop a 7 kg shopping cart in 2 s if it's initially
traveling at 3.5 m/s?

like poles repel so keep pushing north to north and repels funny to see this

find the sum of the two horizontal vectors and the sum of the two vertical vectors

isoceles right angled triangle

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