Kinetic Energy
What type of energy does a moving object have?
Kinetic Energy
What kind of energy is stored because of an object’s position?
Potential energy
What type of energy is stored when an object is stretched or compressed?
Elastic potential energy
What is the flow of electric charge called?
Electric current
Electromagnet
What two factors affect an object's kinetic energy
Mass and Velocity
What does gravitational potential energy depend on?
Mass, height, and gravity
Give one example of something that stores elastic energy.
Rubber band, spring, or bowstring
What happens when current flows through a wire?
A magnetic field is created
What happens to the strength of the magnetic field created by a current-carrying wire if the current is doubled?
The magnetic field strength doubles
If an object’s speed doubles, what happens to its kinetic energy?
It quadruples
What happens to potential energy as an object falls?
It decreases
What happens during a nuclear reaction?
Energy is released from the nucleus of atoms
Definition: A force applied through distance
Work
What happens when an electric current flows through a wire?
It creates an electric field
What is the formula for kinetic energy.
KE = ½mv²
Write the formula for gravitational potential energy.
PE = mgh
What is thermal energy related to?
The motion of particles in a substance
What is the energy due to the gravitational forces between objects?
Gravitational Potential Energy
How can you make an electromagnet stronger?
Add more coils or increase the current
A 2 kg rock moves at 3 m/s. Calculate its kinetic energy.
9 Joules
A 3 kg ball sits on a shelf 2 m high. Calculate its potential energy.
58.8 Joules
Describe how energy is transformed when you stretch and release a rubber band.
Elastic potential → kinetic → thermal (from friction)
If there are two S poles of a magnet facing each other what will happen?
They will repel eachother
Give one real-world use/example of electromagnets
Junkyard cranes, doorbells, MRI machines, etc