forces
force
a push or pull necessary for motion
what is kinetic energy
energy of motion
what is push or pull
force
state of matter that has definite shape
soild
a disk that moves back and forth is called a?
piston
contact force
force that occurs when one object pushes against another object
a parked car
potential
a force that resists motion
friction
the state of matter that has no definite shape,and its molecules tend to diffuse
gas
what is a wheel
connected to metal rods in a steam engine
friction
force that resist motion
is a falling rock in potential energy or kinetic energy
kinetic
what kind kind of force occurs when one object pushes against another
contact force
state of matter that has definite shape,but its molecules stay together
liquid
what a cylinder
where steam from a boilers enters
electric force
electrically charged objects either to attract or repel each other
a girl jumping rope
kinetic
force of attraction between objects
gravity
what is the freezing point and melting point of water
32 degrees F
what is combustion
burning
gravity
the force of attraction that exists between any pair of objects
a book on the edge of the table
pontential
what kind of force do you use when you tap your pencil
contact force
what is the boiling point and condensation point of water
212 degrees F
what are fuels
gasoline,oil,coal,wood