Vocab (Science) Flashcards
Kinetic Energy
The energy a moving object has because of its motion
Potential Energy
Stored energy due to the position
Elastic Potential Energy
Energy stored by something that can stretch or compress
Chemical Potential Energy
Shows a molecule of natural gas
Gravitational potential energy
energy stored by objects due to their position above earth surface
Mechanical Energy
total amount of potential and kinetic energy in a system
Law of Conversation of Energy
States energy cannot be created or destroyed
Work
transfer of energy that occurs when a force makes an object move
Power
Amount of work done in one second
Machine
Device that makes doing work easier
Input force
Force applied
Output force
outside force
Mechanical advantage
ratio of output and input force
Efficiency
How much of the work put into a machine is changed into useful output work by a machine
Simple Machine
is a machine that does work with only one movement of the machine
Lever
a bar that is free to pivot or turn around a fixed point
Pulley
a grooved wheel with a rope chain cable running a long the groove
Wheel and axle
a simple machine consisting of a shaft or axle attached to the center of a larger wheel
inclined plane
sloping surface such as a ramp that reduces the amount of force required to work
Screw
an inclined plane wrapped in a spiral around cylindrical post
Wedge
is an inclined plane with one or two sloping sides
Compound Machine
two simple machine that can work together
