Vocabulary
Kinetic Energy
Potential Energy
Mechanical Energy & Energy Transfer
100
What is the definition of "work"?
Energy transfer from one object to another.
100
A car drives faster and faster. Does its kinetic energy:
A. Increase
B. Decrease
C. Stay the same
D. Disappear
A. Increase
100
True or False: Gravity is a constant FORCE
True!
Gravity is a constant force that pulls objects toward one another.
100
Energy cannot be __________ or __________. It simply changes forms.
Energy cannot be CREATED or DESTROYED.
200
What is the definition of "kinetic energy"?
The energy an object has due to its motion.
200
Two balls are rolling at the same speed. One is a lightweight ping pong ball, and one is a heavy softball. Which has more kinetic energy?
The softball because it has a greater mass
200
A student lifts a book higher and higher off of the ground. What happens to the book's potential energy?
The potential energy increases
200
At which position would the coaster have the MOST potential energy?
Position #5
This point is the highest off of the ground
300
What is the definition of "potential energy"?
Stored energy an object has due to its current position or its current state.
300
What does the graph show about mass and how it affects kinetic energy?
As mass increases, kinetic energy increases
300
Two objects are held above the ground at the same height: a heavy textbook and a lightweight pencil.
Which object has more potential energy?
The heavy textbook
300
At which position would the coaster have the MOST kinetic energy?
Position #3
The coaster would have the most motion at this position
400
What is the definition of "mechanical energy"?
All of the energy an object has because of its motion and its position.
400
What does the graph show about speed and how it affects kinetic energy?
As speed increases, kinetic energy increases
400
An acorn falls from a tall tree is now laying on the ground. What happened to its potential energy?
A. It increased
B. It decreased
C. It stayed the same
D. The energy disappeared
B. It DECREASED
400
A moving bumper car hits a stationary bumper car. What happens to the kinetic energy?
Some of the kinetic energy is transferred to the second bumper car
500
What is the definition of "energy"?
The ability to do work or cause changes in matter.
500
Which factor causes a greater increase in kinetic energy: mass or speed?
Explain how you know using the graphs.
Speed, because increasing the speed increases the kinetic energy at a higher rate
500
A crane is lifted up and down to different heights above the ground.
Which statement best explains how potential energy changes?
A. The crane's energy disappears
B. The crane has less potential energy when it is higher
C. The crane has more potential energy when it is higher
D. The crane's potential energy does not depend on height
C. The crane has more potential energy when it is higher
500
Object #1 crashed into object #2 and caused it to move. Object #1 slowed down, and object #2 sped up. Which object lost kinetic energy and which object gained kinetic energy?
Object #1 lost energy
Object #2 gained energy