What force is acting on an apple hanging from a tree?
What is gravity.
100
When an apple falls from a tree, it begins transforming its potential energy to what?
What is kinetic.
100
Energy can change from one form to another, but the total amount of energy never does what?
What is change.
100
Does a truck moving at the same velocity as a toy car have the same kinetic energy?
What is no, it is greater.
200
What is kinetic energy?
What is the energy a moving object has because of its motion.
200
What force is acting upwards when an apple falls from a tree?
What is air resistance.
200
When a ball is thrown up into the sky, it is fastest when it first leaves your hand. What is the kinetic energy transformed into as the ball reaches the top of its arc?
What is potential.
200
What does the law of conservation of energy state?
What is energy cannot be created or destroyed.
200
What kind of energy is stored by plants?
What is chemical potential energy. (Accept: chemical energy)
300
What is potential energy?
What is stored energy due to position.
300
What is energy?
What is the ability to cause change/work.
300
When an apple falls from a tree, it loses some energy to what kind of energy due to air resistance and friction?
What is thermal energy.
300
True or false: Energy is not constant, and can be created or destroyed.
What is false.
300
The higher above earth's surface an object is, the greater the ___________ energy.
What is potential.
400
What is the equation for kinetic energy?
What is KE = 1/2mv^2.
400
What is mechanical energy the combination of?
What is kinetic energy and potential energy.
400
If air resistance and friction did not effect a falling object, what would remain constant despite the change of kinetic and potential energy?
What is mechanical energy.
400
What law states that the total amount of energy never changes?
What is the law of conservation of energy.
400
If the speed of an object increases horizontally, what happens to the potential energy?
What is does not change.
500
What is the equation for potential energy?
What is PE = mgh.
500
What is said about all the energy in the universe?
What is remains the same.
500
What does electrical energy transform into when used with a hair dryer?
What is kinetic and thermal.
500
What change is occurring when a boulder rolls down a hill?
What is potential to kinetic.
500
The kinetic energy of an object increases as its ________ increases.