Good. So now you know that the weight of the complete rod will stretch one of the spring pieces by 1 cm. How much will the weight of 1/3 of the rod stretch one of those spring pieces?firezap said:each piece will stretch 1 cm
Good!firezap said:1/3 x 1cm = 1/3cm
is it 1/3cm + 2/3cm + 3/3cm = 2cm