Energy Basics
What is the definition of collision?
When two or more objects hit each other.
When does a ball have kinetic energy? When it is sitting still or rolling?
Rolling.
What type of energy does an oven start with?
Electrical energy.
Why does a bowling ball slow down after hitting the pins?
It transfers some of its energy to the pins.
What type of energy does food give athletes?
Chemical energy.
What is kinetic energy?
Energy of motion.
What two things does kinetic energy depend on?
What energy does an oven transform into?
Heat (thermal) energy.
If Car A is slower than Car B, which has more kinetic energy?
Car B
A tennis player uses food energy to play, what’s the transformation?
Chemical to mechanical energy (kinetic accepted)
What is potential energy?
Stored energy due to position or condition.
What kind of energy does a stretched rubber band have before being released?
Potential energy.
A blender transforms electrical energy into what?
Mechanical energy (movement).
When potential energy turns to kinetic energy, what happens to the object?
Which vehicle would have the most kinetic energy going downhill? A bike, a truck, or a train?
Train.
What does it mean to transfer energy?
When energy moves from one object to another.
A skier at the top of a hill and one halfway down, who has more potential energy?
The skier at the top of the hill.
What transformation happens when a guitar string vibrates?
Mechanical (elastic) to Sound energy.
What happens if a truck collides with a stationary car at the bottom of a hill?
The car will move because energy transfers from the truck.
Name one example of energy transfer you might see at home.
(Examples: toaster heating bread, ball hitting another ball)
True or False: Faster objects have more energy.
True
Order these from least to most kinetic energy: Skateboarder, thrown baseball, falling leaf, jet, train
falling leaf, skateboarder, thrown baseball, train, jet
A streetlight absorbs sunlight during the day and glows at night, what’s the transformation?
Light (Solar) to Electrical energy to Light energy.
Describe the kind of energy transfer that would occur from a truck hitting a stationary car.
Kinetic energy from the moving truck transfers to the car, causing it to move.
What happens to energy when it transfers, is it lost or changed?
It changes form or moves, but it’s never lost.