Using hooke's law f spring = k δ x find the force needed to stretch a spring 2 cm if it has elastic constant of 3 n/cm. a. 2/3 n b. 3/2 n c. 6 n d. 3 n

Data:
Hooke represented mathematically his theory with the equation:
 
F = K * x
 
On what:
F (elastic force) = ?
K (elastic constant) = 3 N/cm
x (deformation or elongation of the elastic medium) = 2cm

Solving:





C. 6 N

Ireally don’t know

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