6) (From Page 11) If a small motor does 520 J of work to move a toy car 260
m, what force does it exert?
point
0 135,200 N
O 2N
O 05
O 780N -
7) (From Page 12) A block is sitting on a platform 20 m high. It weights 50
kg. How much Potential energy does it contain?
1000

Alfred pushes on a heavy box, but cannot move it. the box has a lot of inertia motion friction gravity

Ben (55kg) is standing on very slippery ice when junior (25kg) bumps into him. junior was moving at a speed of 8 m/s before the collision and ben and junior embrace after the collision. find the speed of ben and junior as they move across the ice after the collision. give the answer in m/s. describe the work you did to get the answer.

The first law of thermodynamics states that heat added to a system is neither created nor destroyed but is as it changes into other forms of energy.