Potential and Kinetic Energy
Energy due to motion
What is kinetic energy?
This form of energy comes from moving electric charges.
What is electrical energy?
A toaster transforms electrical energy into this main form.
What is thermal energy?
Waves that move particles perpendicular (T) to the direction of energy transfer.
What are transverse waves?
A push or pull on an object.
What is a force?
Energy stored in an object due to its position or shape.
What is potential energy?
This form of energy travels in waves and can be seen by humans.
What is light energy?
A roller coaster at the top of a hill transforms this type of energy into kinetic energy as it goes down.
What is gravitational potential energy?
Waves that move particles parallel (ll) to the direction of energy transfer.
What are longitudinal waves?
When the net force on an object is 0, the forces are said to be ____.
What is balanced?
A stretched rubber band has this type of potential energy.
What is elastic potential energy?
Heat energy is also called ____.
What is thermal energy?
A light bulb transforms electrical energy into these two forms.
What are light and thermal energy?
Sound travels through this type of wave.
What is a longitudinal wave?
A soccer ball slowing down as it rolls across grass is caused by this force.
What is friction?
A ball sitting at the top of a hill has this type of potential energy.
What is gravitational potential energy?
The beating of a drum produces this form of energy.
What is sound energy?
In a battery-powered flashlight, chemical potential energy first transforms into this before becoming light.
What is electrical energy?
Ocean waves are an example of this type of wave.
What is a transverse wave?
If a box is pushed to the right with 50 N and to the left with 20 N, the net force is ____.
What is 30 N to the right?
A stretched bow is released, sending an arrow flying. Identify the types of energy involved and explain how they change.
The bow has elastic potential energy when stretched. When released, that energy transforms into kinetic energy of the arrow. Some energy is also transformed into sound and thermal energy.
A moving car combines these two main forms of energy. (Hint: fuel -> movement)
What are chemical potential energy (in fuel) and mechanical energy (motion)?
What is the Law of Conservation of Energy?
Energy cannot be created or destroyed, it changes form.
Draw a picture of a transverse wave.
(Up and down)
Explain the difference between balanced and unbalanced forces.
Balanced = no change in motion; unbalanced = motion changes (speed/direction).