Give an example of a balanced force and explain what makes it a balanced force

When two forces are the same strength but act in opposite direction, they are called balanced forces. Again, tug-of-war is a perfect example. If the people on each side of the rope are pulling with the same strength, but in the opposite direction, the forces are balanced. The result is no motion.

The duration of a photographic flash is related to an rc time constantly

Answerboth technicians (a) and (b);