Vocabulary
Forms of Energy
Potential & Kinetic Energy
Calculating Speed
Distance vs. Time Graphs
100
The ability to do work is called __________
Energy
100
Name at least two forms of energy the sun gives off
Thermal energy, light energy, and nuclear energy
100
What is the difference between Potential and Kinetic Energy?
Potential energy is stored energy or energy of position
Kinetic energy is moving energy or energy of motion
100
What is the formula used to calculate speed?
speed = distance / time
100
When there is a horizontal line on a distance vs. time graph, what is happening?
The object is stopped/not moving
200
The distance traveled per unit of time is called __________
Speed
200
Give two examples of sound energy
playing an instrument, the beeper on a microwave, etc.
200
True or false, the amount of kinetic energy that you end with will be the same as the amount of potential energy you started with.
True
200
Name three units for speed
m/s
km/hr
mph
in/s
200
Name 2 ways you can compare the speed of two lines on a distance vs. time graph
1. the steepness of the line
2. calculating the speed
3. looking at how far the objects traveled in the same amount of time
300
Velocity
The distance an object travels in a unit of time with direction
300
What form of energy is the kinetic energy of something's particles? (ex. fire or a heater)
Thermal or heat energy
300
When you increase the mass and/or the height of an object, what happens to the potential energy?
It increases
300
A car travels 175 km in 4 hours. Calculate the speed of the car. Don't forget to label!
43.75 km/hr
300
Which line has a faster speed?
Line A
400
Law of Conservation of Energy
Energy cannot be created or destroyed
400
Energy stored in the bonds of chemical compounds is what form of energy?
chemical energy
400
Where would you have the most potential energy? Where would you have the most kinetic energy?
Most Potential: At the top
Most Kinetic: At the bottom
400
A bike reached a speed of 65 ft/min. If the cyclist biked for 30 min, how many feet did he travel?
1,950 ft
400
Explain what is happening at each point on the graph
A- moving away from start
B- stopped/not moving
C- moving away from the start
D- moving back toward the start
500
Energy Transformation
the change of one form of energy to another
500
This form of energy is the addition of potential and kinetic energy. Name the form of energy and at least one example.
Mechanical energy.
Hammering a nail, throwing a baseball, etc.
500
As you go down a hill what is the energy transformation? As you go up a hill what is the energy transformation?
Down: PE --> KE
Up: KE --> PE
500
Calculate the speed of the line using s=d/t
3 m/s
500
Tell a real story about the graph
any story that matches the graph