Two objects were lifted by a machine. one object had a mass of 2 kilograms, and was lifted at a speed of 2m/sec. the other had a mass of 4 kilograms and was lifted at a rate of 3 m/sec. which object had more kinetic energy while it was being lifted ?

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.

the duration of a photographic flash is related to an rc time constant, which is 0.100 μs for a certain camera.