AP Physics 1 energy bar charts
AP Physics 1 energy bar charts visualize the distribution of energy types in a system, illustrating conservation and transformation principles.
Quiz(17 questions)
1. What does an energy bar chart primarily show?
Terms in this Study Set(22)
What are energy bar charts?
Visual representations showing different forms of energy in a system. Helps analyze energy conservation.
Types of energy in bar charts
Kinetic Energy (KE), Potential Energy (PE), Thermal Energy, Chemical Energy, etc.
True or false: Energy bar charts show only kinetic energy.
False, because they include all forms of energy in a system.
Difference between KE and PE
Kinetic Energy is energy of motion, while Potential Energy is stored energy based on position.
Calculate KE formula
, where is mass and is velocity.
What does a flat bar represent?
A constant energy value, indicating no net work is done.
True or false: Energy is created in bar charts.
False, because energy is conserved and transformed, not created.
Fill the blank: PE increases when an object is _____.
elevated in a gravitational field.
What happens during a collision?
Total energy is conserved, transferring between KE and PE as needed.
What is total mechanical energy?
Sum of Kinetic Energy and Potential Energy: .
Energy transformation example
A falling object converts PE to KE as it descends.
True or false: Bar heights represent energy values.
True, because taller bars indicate greater energy amounts.
Difference between conservative and non-conservative forces
Conservative forces (e.g., gravity) conserve mechanical energy; non-conservative (e.g., friction) do not.
Fill the blank: Work done on an object changes its _____.
energy state.
What does the area under the curve in a graph represent?
Work done or energy transferred over time in a system.
What is an example of a non-conservative force?
Friction, as it dissipates mechanical energy into thermal energy.
True or false: Total energy can decrease in a closed system.
False, because energy is conserved in a closed system.
What happens to energy in an isolated system?
It remains constant; energy can change forms but the total remains the same.
Energy transformation in a pendulum
At the highest point, all energy is PE; at the lowest, all is KE.
What does a decrease in PE indicate?
An increase in KE, as energy transforms between types.
Flashcard: Definition of mechanical energy
The sum of KE and PE in a system, indicating the system's total energy.
What is energy conservation?
The principle stating that energy cannot be created or destroyed, only transformed.
Questions in this Study Set(17)
1. What does an energy bar chart primarily show?
2. Which energy type is represented as height in a bar?
3. What happens to the PE as an object falls?
4. Which of the following is NOT a form of energy in a bar chart?
5. What does the total height of bars represent?
6. Energy bar charts can be used to illustrate which principle?
7. If an object's KE increases, what happens to its PE?
8. In a vacuum, a falling object demonstrates the conversion of _____.
9. True or false: Energy bar charts show energy losses.
10. Which force example represents a non-conservative force?
11. How does an energy bar chart change when work is done on a system?
12. What is the shape of energy bar charts typically?
13. Which energy is least affected by height?
14. If a bar decreases while another increases, what does it indicate?
15. When is total mechanical energy conserved?
16. Fill in the blank: Energy bar charts help visualize _____ in a system.
17. What is the role of gravitational force in energy transformations?
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