Energy Transfer Flashcards
(24 cards)
What is energy?
Energy is the ability to do work or cause change.
What are the two main types of energy?
The two main types of energy are potential energy and kinetic energy.
True or False: Kinetic energy is the energy of motion.
True
Fill in the blank: Potential energy is stored energy based on an object’s ______.
position
What factors affect potential energy?
Potential energy is affected by an object’s mass and height above the ground.
Multiple Choice: Which of the following is an example of kinetic energy? A) A rock at the top of a hill B) A moving car C) A compressed spring
B) A moving car
What type of energy does a stretched rubber band have?
A stretched rubber band has potential energy.
True or False: Energy can be created and destroyed.
False
Fill in the blank: The law of conservation of energy states that energy cannot be ______ or ______.
created; destroyed
What happens to potential energy as an object falls?
As an object falls, its potential energy decreases and its kinetic energy increases.
Multiple Choice: Which type of energy is highest when an object is at its highest point? A) Kinetic energy B) Potential energy C) Thermal energy
B) Potential energy
What is gravitational potential energy?
Gravitational potential energy is the potential energy an object has due to its height above the ground.
True or False: A moving skateboard has both kinetic and potential energy.
True
Fill in the blank: The unit of energy in the International System of Units (SI) is the ______.
joule
What is the relationship between mass and kinetic energy?
Kinetic energy increases with an increase in mass, assuming velocity remains constant.
Multiple Choice: Which of the following demonstrates energy transfer? A) A ball rolling down a hill B) A book on a shelf C) A light bulb turned off
A) A ball rolling down a hill
What type of energy transformation occurs when you turn on a light bulb?
Electrical energy is transformed into light and thermal energy.
True or False: An object at rest has kinetic energy.
False
Fill in the blank: The energy of an object due to its motion is called ______ energy.
kinetic
What is elastic potential energy?
Elastic potential energy is stored in objects that can be stretched or compressed, like springs or rubber bands.
Multiple Choice: Which scenario would result in the greatest kinetic energy? A) A bicycle at 5 m/s B) A car at 20 m/s C) A train at 10 m/s
B) A car at 20 m/s
What is mechanical energy?
Mechanical energy is the sum of potential energy and kinetic energy in an object.
True or False: All forms of energy can be converted into each other.
True
Fill in the blank: The total mechanical energy of an object is conserved in the absence of ______ forces.
external
