Types of Energy
This type of energy is the energy of motion; a rolling ball or a moving car has it.
What is kinetic energy?
Amy pushes a lawn mower with 20 N of force for 10 meters. What is the work she does?
What is 200 Joules?
This law states that an object at rest stays at rest, and an object in motion stays in motion unless acted on by an unbalanced force.
What is Newton’s First Law of Motion (law of inertia)?
This force pulls objects toward Earth’s center, giving them weight.
What is gravitational force?
What is the unit of GPE (gravitational potential energy)?
What is a Joule (J)?
Stored energy based on an object’s position or condition, like a rock on the edge of a cliff or a stretched bow.
What is potential energy?
An elephant pulls a circus wagon with a force of 200 N for 20 meters. How much work is done?
What is 4,000 Joules?
A rocket launches into space because the burning fuel pushes gases downward, and the gases push the rocket upward. Which law is this?
What is Newton’s Third Law of Motion?
This force resists the motion of objects as they slide or attempt to slide across a surface.
What is friction?
What do you call the amount of matter in an object, which stays the same even if gravity changes?
What is mass?
When you rub your hands together and feel heat, you are experiencing this type of energy.
What is thermal energy?
Tommy uses 15 Joules of work to push a pencil 3 meter. How much force did he apply?
What is 5 Newtons?
When you kick a soccer ball, the acceleration depends on both the size of the force and the ball’s mass. Which law is this?
What is Newton’s Second Law of Motion?
This upward force makes objects float in water and other fluids.
What is buoyant force?
A child on a swing goes back and forth, converting between which two forms of energy?
What are kinetic and potential energy?
This type of energy is the sum of kinetic and potential energy, like a roller coaster at the top of a hill and rushing down.
What is mechanical energy?
Angela lifts her grocery bag using 50 N of force. If she does 25 J of work, how far did she lift the bag?
What is 1/2 meter?
A swimmer pushes water backward with their arms, and the water pushes them forward. Which law does this show?
What is Newton’s Third Law of Motion?
When a parachute slows a skydiver’s fall, this force is acting against gravity.
What is air resistance?
A car is falling with a parachute deployed. In its force diagram, which two arrows are shown pointing in opposite directions?
What are gravity and air resistance?
The Sun produces this type of energy through fusion, and nuclear power plants generate it through fission.
What is nuclear energy?
A baseball player does 1234 Joules of work hitting a baseball that travels 100 m. How much force was used?
What is 12.34 Newtons?
When a magician pulls a tablecloth out from under dishes and the dishes stay in place, this is an example of which law?
What is Newton’s First Law of Motion?
A person pulls on a rope to hoist a flag up a flagpole. The rope pulls back with an equal force in the opposite direction. Which type of force is this?
What is tension force?
A car battery powers the radio while the engine runs. Name the energy transformations from the chemical energy in the battery to the sound waves from the radio.
What is chemical → electrical → sound (and some thermal)?