2. What is the magnitude of the repulsive force between two pith balls (small, light balls
that are easily charged) that are 0.08 m apart and have equal charges of 3.0 x 10-8 C?'

what was the acceleration of the 2 kg cart?

⇒ 16.0 cm/s2

what was the acceleration of the 4 kg cart?

⇒ 8.1 cm/s2

what was the acceleration of the 6 kg cart?

⇒ 5.3 cm/s2

where is the circuit diagram ?

your answer is c! hope this : )