Energy, Work, and Power
What is energy?
The ability to do work or cause change
What is kinetic energy?
How is mechanical energy calculated?
By adding together an object's potential and kinetic energy
What happens to energy when it is transformed?
It turns into a different kind of energy.
What happens to energy when it is transferred?
It moves from one object to another object.
What is potential energy?
The energy that an object has due to its shape or position
What is thermal energy and what is on example of this type of energy?
Thermal energy is heat energy. Examples will vary.
How is energy transformed when you eat? (You must name the two types of energy involved.)
Chemical energy is transformed into kinetic or mechanical energy.
What unit is used when measuring energy?
Joules
What are the two types of potential energy?
Gravitational potential energy and elastic potential energy
Name an example of a device that uses electrical energy.
Answers may vary.
How is energy transformed when you plug in a lamp. (You must name both types of energy involved.)
Electrical energy is transformed into electromagnetic energy (light) and thermal energy (heat).
What is energy's connection to work?
The transfer of energy is the same as work.
What are two ways you could give an object potential energy?
By putting it up somewhere high or by stretching the object
Name an example of chemical energy.
Answers may vary.
What is the law of conservation of energy?
When energy is transferred or transformed, no energy is lost in the process. Energy cannot be created or destroyed.
What is energy's connection to power?
The amount of energy transferred in a given amount of time is power.
How do mass and speed affect kinetic energy?
The greater the object's mass and speed, the greater its kinetic energy.
What are three types of electromagnetic energy?
Light, ultraviolet waves, microwaves, radio waves, X-rays, infrared waves
What happens to some of the energy that is not directly transferred to the object upon which work is performed?
It is transformed into thermal energy due to friction.