The drawing shows three identical springs hanging from the ceiling. Nothing is a

Question

The drawing shows three identical springs hanging from the ceiling. Nothing is attached to the first spring, whereas a W = 8.91-N block hangs from the second spring. A block of unknown weight hangs from the third spring. From the drawing, determine the spring constant (in N/m) and the weight of the block hanging from the third spring.

(a) the spring constant
N/m

(b) the weight of the block hanging from the third spring
N

The drawing shows three identical springs hanging from the ceiling. Nothing is attached to the first spring, whereas a W = 8.91-N block hangs from the second spring. A block of unknown weight hangs from the third spring. From the drawing, determine the spring constant (in N/m) and the weight of the block hanging from the third spring. (a) the spring constant N/m (b) the weight of the block hanging from the third spring N

Explanation / Answer

use F =-kx, x is the displacement

from spring1 and spring2
the difference in distance is x. and F = 8.91 N
so, -k = F/x, use this -k in spring 3 to get F, which is the weight of the unknown block.

Spring 3
F (weight of unknown block) = -k(which you get from spring 2) *x (the displacement of spring 3)

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