Experiment 1: Cart A (mass of 500g). Moves to the right at a constant 0.37m/s speed and hits a stationary cart B (mass of 500g). Cart A stops and cart B starts moving at the speed of 0.37m/s to the right.

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.

If the force applied to an object remains constant, is more power needed for the object to move faster ? explain

Which of these has some mechanical energy? a. an atom b. heat inside earth c. a book on a shelf d. the fire from a lit match