1. Eight more than one - fourth of d 2. Twice the sum of a number y and eight is 4
3. Five less than twice a number h
4. Nine less than twice a number x is twice of a number y

the answer is neither ball has a charge.

because if they were both positively charged, they will repel each other.

if they were positively and negatively charged, they will seek.

higher potential

explanation:

because it is in a high speed so it must move into a of high potential

friction

explanation:

they us to move forward and backwards