Energy, Force, Work, and Power
What is energy?
The potential to do work
What is potential energy?
Stored energy
What is kinetic Energy?
The energy an object has due to its motion.
Name two other forms of energy.
mechanical
chemical
nuclear
thermal
electromagnetic radiation
What is energy transfer?
One type of energy moving from one object to another.
What is pressure?
A pushing force on an area.
What is work?
Making something move or change
Name two types of potential energy.
Gravitational, elastic, chemical
Give an example of something with kinetic energy.
Anything falling
a person walking
A ball flying or rolling
Waves in the ocean
Which form of energy is stored in food?
Chemical
What is energy transformation?
Energy changing from one type to another.
What is the unit for measuring pressure?
Name two forces.
Gravity, magnetism, friction
What affects gravitational potential energy?
Mass, height, and gravity
What affects kinetic energy?
Mass and velocity
What form of energy is light?
Electromagnetic radiation
How much energy is lost during energy transference and transformation?
None
What affects the number of pascals?
Force and surface area
If two people do the same amount of work but one person used more power, what does that mean?
One person did the work faster.
Where would an object have more or less gravitational potential energy?
On another planet, or on a moon
Which has a bigger effect on kinetic energy, mass or velocity?
Velocity
Which form of energy changes states of matter?
Thermal
What transformation happens during combustion?
Chemical energy is transformed to thermal and light (electromagnetic) energy.
Will increasing the surface area increase or decrease pressure?
Decrease
When is the movement of an object not work?
When the movement is not in the direction of the force.
Give an example of elastic potential energy.
spring, rubber band, bow and arrow, any distorted object that wants to return to its original shape
Why does velocity have a greater effect on kinetic energy than mass?
What is the difference between nuclear fission and nuclear fusion?
Fission breaks up a nucleus and fusion combines two nuclei.
If no energy is lost during transfer and transformation, why do moving objects slow down and stop, even if they don't hit another object.
Friction
Why is there more air pressure at sea level than on top of a mountain?
Column pressure
Air has mass and there is more air on top of the air at sea level pressing down.