A force of 100N stretches an elastic string to a total le...
A force of 100N stretches an elastic string to a total length of 20cm. If an additional force of 100N stretches the string 5cm further, Find the natural length of the string
15cm
12cm
10cm
8cm
5cm
Correct answer is A
Using, f1 = f2
e1 = 20 - L ; e2 = 5cm
f1e1 = f2e2
10020−L = 1005
hence, L = 15cm