Name:_____________________
Unit 7 Study Guide
1.The energy of the pendulum is recorded at different positions in the table. How much kinetic energy does the pendulum have at position 3?
Position P.
Energy K.
Energy
Total Energy
1 72.26 27.74 100
2 63.45 36.55 100
3 58.09 100
41.91
2.
Which ball has the least amount of potential energy? Why?
Ball D because it has a speed of 2m/s and is at 678cm above sealevel
3.A chair sitting on the floor has potential energy because of the gravitational pull of the Earth. Which of the following would increase the potential energy of the chair?
Lifting the chair off of the floor.
4. An object's kinetic energy is proportional to what two properties?
Mass and distance
5. On a rollercoaster, where would the least amount of gravitational potential energy be?
At the base of the roller coaster.
6. Explain why a school bus going 2m/s has more potential energy than a cat running at 2m/s.
The school bus has more mass.
7. What is kinetic energy?
Energy in motion.
8. Draw a roller coaster. Identify where the most gravitational potential energy would be.
At the highest point.
9. Draw a rollercoaster. Identify where the most potential energy would be.
10.Explain how kinetic energy and potential energy can change as a ball
This would be located at the highest point.
rolls down a set of steps.
The balls potential energy will decrease as it rolls down the steps and will convert to kinetic energy which will increase as it goes down the steps.
11. Two objects of different masses are moving the same speed. Which one has more kinetic energy?
The heavier one
12. Describe potential energy.
Stored energy
13. Two identical objects sit on top of roofs at different heights above the Earth’s surface. Which one has more gravitational potential energy?
The one on the taller roof.
14. Draw a rollercoaster with three hills at different heights. Why did you order your hills the way you did?
The should be ordered from tallest to shortest.
15.
Which position has the greatest amount of kinetic energy?
3
16. Based on the graph below, is positive, negative, or no work being done on the object? Explain how you know.
Positive because it is going up.
17. Draw a roller coaster. Identify where there would be the largest velocity.
At the lowest point.
18. In your rollercoaster from question 17, where is the total amount of energy?
All points have the same velocity.
