A 50-cm-long spring is suspended from the ceiling. A 230 g mass is connected to the end and held at rest with the spring unstretched. The mass is released and falls, stretching the spring by 28 cm before coming to rest at its lowest point. It then continues to oscillate vertically. a. What is the spring constant? (K=)
b. What is the amplitude of the oscillation?
c. What is the frequency of the oscillation?

Answer: fn = wcos50 = 38.89(9.81)(cos50) = 245.23 n

Ohm's law tells you that i = v/r where v is equivalent voltage and r is equivalent resistance of the circuit
since all circuits have the same voltage, your question is really asking which circuit has the lowest total resistance, since the lower the resistance, the higher the current
circuit a has a resistance of 5 ohms; circuit c is in series so has a resistance of 10 ohms; circuit b is in parallel and therefore has a resistance of 2.5 ohms (review your notes on adding resistances in parallel and series); therefore b has the highest current