Physical Science Energy Video Assignment

After watching the video “Eureka: Energy and Force” answer the following questions (class notes and your text may also come in handy):

1. In your own words describe the difference between mass and weight.  What is your mass?  What is your weight?
2. Come up with three of your own examples of work.  One with force in the direction of motion, one with it opposite and one perpendicular.  Give values for the forces, distances and works.
3. How is work related to energy?
4. What is kinetic energy in words? Come up with your own example of kinetic energy and calculate it.
5. What is potential energy?  Come up with your own example of potential energy and calculate it.
6. BONUS: use the fact that when there is no work being done on an object except by basic forces the change in kinetic energy and potential energy add to zero to find the speed with which a ball dropped from 25m will hit the ground.  How would this change if the ball swung down 25m in height on a rope? Or, slid down a frictionless surface a total drop of 25m in height?