You drop your brand new phone (174 grams) down a well. You hear a splash 8.0 seconds later. What was your phone's speed just before it reached the water? (Hint: you may need to convert units)

From center station, a train departs every 30 minutes on the fast line and a train departs every 50 minutes on the state line. if two trains depart from center station at 8: 00 a.m., one on each of the two lines, what is the next time that two trains, one on each line, will depart at the same time?

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.

The slope of a velocity time graph over any interval of time gives the during that interval