The drawing shows three identical springs hanging from the ceiling. Nothing is attached to the first spring,
whereas a 4.0
-N block hangs from the second spring. A block of unknown weight hangs from the third spring. From the drawing, determine (a) the spring constant (in N/m) and (b) the weight of the block hanging from the third spring.
Will I need to use Hooke's law (F= -kx) for part A and B? I tried dividing 4.0 newtons by the x for the second spring to get the spring constant, but it isn't correct.