View source for Static and Dynamic Equilibrium EX 5

The forces acting on the block:<br><br>
[[image: Helena Stat Dyn Sol 5.png|TOP]]<br><br>

The acceleration of the block is zero and so, the sum of the forces exerted on the block is zero:

<math>F_S - F_G = 0</math>
<br><br>
It follows from this equation that the magnitude of the force of the spring must be equal to the magnitude of the gravitational force.

<math>k x = m g</math>

<math>x = {mg \over k} = {(8)(10) \over 5 \times 10^3} = 1.6 \times 10^{-2} m = 1.6 cm</math>