A skydiver of mass mmm jumps from a hot air balloon and falls a distance ddd before reaching a terminal velocity of magnitude vvv. Assume that the magnitude of the acceleration due to gravity is g. Required:
Find the power Pd supplied by the drag force after the skydiver has reached terminal velocity v. (in same terms)

Does work output exceed work input when a machine is used? a) yes, it does, as machines create energy. b) it depends on the type of machine used. c) no, it doesn’t, as machines are inefficient. d) no, it doesn’t, as machines cannot create energy.

Anybody wanna ? (picture included? )

Imagine that you have two balloons (or, better yet, actually inflate two balloons, if possible). create static electricity around one of the balloons by rubbing it against your hair or your sweater and then bring that balloon close to the other balloon, which has not been charged. try this with at least one other object—and for variety in the discussion, avoid using an object already described by your classmates. then, for your initial post to the discussion, answer the following questions: what happened with the two balloons?