Question

WHT IS HOOK,S LAW

Answer 1

Hooke's law states that the force F required to restore a spring is given by

F = kx

where x is the distance the spring is stretched or compressed from its rest position and k is the constant of proportionality or the spring constant.


Example:

Suppose a spring is stretched 0.30 m with a force of 360 N. How far can the spring be stretched from its rest position if a 225 N force is applied?

Solution:
The spring is stretched 0.30 m with a 360 N force. Applying this knowledge, we first find the spring constant k. Thus

F = kx
k = F/x
k = (360 N)/(0.30 m)
k = 1200 N/m

Now we have

F = 1200x

We're asked how far can the spring be stretched from its rest position if a 225 N force is applied. Thus

F = 1200x
x = F/1200
x = 225/1200
x = 0.188

∴ the spring must be stretched 0.19 m from its rest position.

Answer 2

Hook's law states that within elastic limit stress proportional to strain

Answer 3

stress/strain=modulus of elasticity