Question

The relationship between the length of a spring and the force required to stretch the spring is shown below.

graph is #2 in word doc
What is the work done when the spring length is increased from 20 cm to 30 cm?
A.25 J
B.35 J
C.250 J
D.350 J

Answer 1

The answer is down below

Step-by-step explanation:

1)

`f \alpha e`

`f = ke`

where e is the extension

and k is the elastic constant

2)e=30-20=10cm

W=1/2Fe or 1/2ke²