Consider the setup below: h1 = 200.0 cm, h2 = 150 cm, and at A the 3.00 g bead has a Downward Speed along the wire of 800.0 cm/s. In other words at point A the bead has both potential energy and kinetic energy.
a. How fast is the bead moving as it passes point B if friction is negligible?
b. How much energy did the bead lose to friction work if it rises to a height of 20.0 cm above C after it leaves the wire?