Springs can also be found in car suspension systems.
In cars, springs have the function of absorbing shocks from the road and wheel vibration so they are not transmitted directly to the vehicle body.
In addition, springs are also useful for increasing tire traction on the road surface.
When a conventional spring, without the stiffness variability feature, is compressed or pulled from its free position, will use the opposite force in proportion to the change in length.
The rate of spring or the spring constant is the change in force that it exerts, divided by the change in spring deflection. That is, it is a force gradient versus a deflection curve.
The degree of stretch or the degree of compression of the spring is expressed in units of force divided by the distance, for example N / m or lbf / in. A torsion spring is a spring that acts on rotation, when rotated around its axis at a certain angle, it will produce a torque proportional to the angle.
The rate of spring torsion is in units of torque divided by the angle, such as Nm / rad or Nm / degree.
