8. What will be the extension of a spring of K = 10 N/m, if the load is 75g?

The extension of the spring is 7.35 cm

Explanation:

Spring Force

When a spring is compressed or extended by a distance x, it exerts a force given by the Hooke's Law:

F=k.x

Where k is the constant of the spring.

A mass of m=75 gr is hung to the spring of constant k=10 N/m. The force applied to the spring is the weight of the mass:

W = mg

The mass must be converted to kg:

m = 75/1000 = 0.075 kg

W=0.075*9.8

W = 0.735 N

The extension of the spring can be computed by solving for x:

x=0.0735 m

x = 7.35 cm

The extension of the spring is 7.35 cm

the displacement produced by the body.  

the amount of force subjected to the body.  

the angle between the direction of force and displacement

cant without the picture! ?