As shown in the diagram, a bead slides on a wire which is in a vertical plane (i. e. perhaps in the plane of your computer screen). Gravity acts in the -y direction (down). The bead starts at A and moves to the right with an initial velocity v. The wire is frictionless between A and D and also between F and G, but there is friction between D and F. For each statement select True, False, Greater than, Less than, Equal to, or Not enough information to tell.

Consider a small frictionless puck perched at the top of a fixed sphere of radius r. if the puck is given a tiny nudge so that it begins to slide down, through what vertical height will it descend before it leaves the surface of the sphere? [hint: use conservation of energy to find the puck's speed as a func e conservation of energy to find the puck's speed as a function of its height at what value of this normal force does the puck leave the sphere? ] here on the puck.