Row 1
What is energy?
Ability to do work.
What is mechanical energy ?
total kinetic energy plus total potential energy
What is potential energy?
stored energy
What is kinetic energy ?
motion or movement
True or False
The energy stored in an object as a result of its vertical position or height is Potential Energy.
False it is gravitational potential energy.
What’s the difference between potential and kinetic energy?
Potential energy is the energy of position and
kinetic energy is the energy of motion
Name 2 ways to increase gravitational potential energy
Increase weight or increase height
What does the Law of Conservation of Energy state?
Energy cannot be created or destroyed.
A book sitting on a shelf has _______ energy.
Potential
Which of the following has the most potential energy ?
A. A car at the top of the hill.
B. A car speeding down the hill.
C.A person at the top of the hill.
A. A car at the top of the hill
When is kinetic energy greatest? Why?
Kinetic energy is greatest when the ball is first thrown upward because that’s when the ball has the greatest speed. As the ball continues to move upward it slows down and kinetic energy changes to potential energy.
Give an example of elastic potential energy.
Stretching a rubber band
Which of the following has the least potential energy?
A. A truck at the top of the hill.
B. A bowling ball at the top of the hill.
C. A feather at the top of the hill.
D. A feather at the bottom of the hill.
D. A feather at the bottom of the heal
Which of the following units are used for energy?
A. Newton
B. Liter
C. Meter
D. Joule
D. Joule
A stationary object may have
A. potential energy
B. velocity
c. kinetic energy
D. speed
When you do work on an object, some of your energy is _________ to that object.
transferred
Potential energy results from the _____ or position of an object.
shape
gravitational energy
A change in an object's speed has a(n) ______ greater effect on its kinetic energy than a change in its mass.
greater
Gravitational Potential Energy (GPE) equals:
A. Weight x Height 9.8m/s2
B. Temperature x Volume
C. Potential x Kinetic Energy
D. Chemical x Electrical Potential
A. Weight x Height 9.8m/s2
While throwing a ball in the air, when is potential energy greatest? Why?
Potential energy is greatest when the ball reaches its highest point because that’s when it has the greatest potential to fall and the greatest gravitational force acting on it (GPE = weight X height).
What two factors affect kinetic energy ?
mass and speed
Exerting a force on an object that causes the object to move is called
work
Blair and her sister are identical twins riding roller coasters at Kinetic Kars. They ride each roller coaster on their own once. Next time, they ride the roller coaster together. On which ride do they have do they have the most kinetic energy ?
A. The first ride.
B. The second ride.
C. It is the same on both rides
D. There is no kinetic energy on either rides.
B. The second ride
A baseball moving through the air at 5 meters above the ground at 20 m/s. What type of energy does the baseball have?
A. Potential energy only
B. Kinetic energy only
C. Kinetic and Potential energy
D. It does not have energy
C. Kinetic and Potential energy