A 0.1 kg popper is placed on a table. When it pops up, it reaches a height of 2.0 meters. What was the initial velocity
of the popper off the table?

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.