<Continuation of the question>
(a) the spring constant (in N/m) and
(b) the weight of the block hanging from the third spring.
the distance for the first spring is 20cm, the second 35cm, the third 50cm.
Answer:
a) To find the spring constant, we'll use the formula
F=kx, if we make k the subject we'll get
k=F/x, where F=4.5N, x = 35cm - 20cm = 15cm = 0.15m
k=F/x = 4.5N/0.15m = 30N/m is the Answer
b) to find the weight of block hanging on third spring
we use the formula F=kx
where k = 30N/m, x=50cm-20cm=30cm=0.30m
F=kx = (30N/m)*(0.30m) = 9N is the Answer
