A spring 20cm long is stretched to 25cm by a load of 50n, what will be its length when stretched by 100n , assuming that elastic limit is not exceeded?

3 answers

if 50N expands it 5cm, 100N will expand it 10 com, or to 30cm length.
25 - 20 = 5 cm,

50/5 = 100/X,
L = 20 + x.