## Centripetal ForceSlinkys can also be used to ddemonstrate centripetal force.Newton's first law says that an object will continue in motion in a straight line unless a force acts to change the motion. When the motion of a ball or Slinky is in a circle, the force is named the Centripetal Force. This Centripetal force is a part or component of the tension force that supports the slinky as it swings around in a circle and it equals: F _{ (centripetal) } = ((mass*velocity ^{ 2 } )/radius) = 4*pi*mass*radius/T
^{ 2 }
In an experiment, one measures the angle of swing of the slinky [in this example about 40 degrees], the period or the time for one revolution, called T, and the radius. the angle = _________________ the period, T = _____________ the radius, R = _____________ AN EXPERIMENT: F _{ (centripetal) } experimental = m*g*tan(angle)F _{ (centripetal)} theoretical = 4*pi*m/T ^{ 2 } The mass, m, is the same in each case! Does F _{ (centrifugal) }experimental = F_{ (centrifugal)} theoritical?% of error = ???? Back to the Slinky Homepage... To Go to Bob Barrett's Home Page |