Simple Machines
A rigid bar used to exert a pressure or sustain a weight at one point of its length by the application of a force at a second point and turning at a third on a fulcrum.
What is a lever?
An external force applied to an object.
What is effort force?
A circular toothed object used to transfer rotary motion and torque through interlocking teeth.
What are gears?
A resource that cannot be replaced once used.
What is nonrenewable?
The resistance that one surface or object encounters when moving over another.
What is friction?
A type of lever that is a wheel with a groove in its rim, which is used to change the direction or multiply a force exerted by a rope or cable.
What is a pulley?
The ratio of useful energy output to the total energy input, or the percentage of work input that is converted to work output.
What is efficiency?
The rate at which work is performed or energy is expended.
What is power?
A resource that can be replaced when needed.
What is renewable?
The rate at which work is performed or energy is expended.
What is power?
Two differently sized circular objects that are attached together and turn as one.
What is wheel and axle?
Impeding effect exerted by one material object on another.
What is resistance force?
A gear positioned between the driver and the driven gear used to change rotational direction.
What is an idler gear?
An energy source that will never run out.
What is inexhaustible?
The potential difference measured in volts.
What is voltage?
Any of various elementary mechanisms including the lever, wheel and axle, pulley, inclined plane, wedge, and screw.
What are simple machines?
The ratio of the magnitude of the resistance and effort forces applied to a system.
What is actual mechanical advantage?
A type of lever that is a wheel with a groove in its rim, which is used to change the direction or multiply a force exerted by a rope or cable.
What is a pulley?
The use of heat from within the Earth or from the atmosphere near oceans.
What is thermal energy?
Energy caused by the movement of charged particles.
What is electrical energy?
The structure of or the relationship of the parts in a machine or in a construction or process comparable to a machine.
What is mechanism?
Ratio of distance traveled by the applied effort and resistance force within a system.
What is ideal mechanical advantage?
A toothed wheel whose teeth engage the links of a chain.
What is a sprocket?
Changing one form of energy to another.
The production of electricity in conductors with the use of magnets.
What is electromagnetic induction?