The percentage of the input work that is converted to output work
the fixed point around which a lever pivots
a flat surface with one end higher than the other
the force exerted on a machine
the force exerted on an object by a machine
a unit of work equal to one Newton-meter
a simple machine that gives a mechanical advantage when given a fulcrum
a device that changes the amount of force exerted or the direction in which force is exerted
the number of times the force exerted on a machine is multiplied by the machine
A grooved wheel around which is wrapped a rope, chain, or cable
an inclined plane wrapped in a spiral around a cylindrical post
an inclined plane that moves
Wheel and Axle
a simple machine made of two circular or cylindrical objects fastened together that rotate about a common axis.
force exerted on an object that causes it to move
When does one know when work is being done on an object?
When the force on an object causes it to move in a given direction.
How do you figure out the efficiency of a machine?
Divide output work by input work and multiply by 100%; (OUTPUT Work/INPUT Work)x100%
How do you find out the mechanical advantage of a machine?
Divide output work by input work;OUTPUT Work/INPUT Work (Note: No unit)
What is a compound machine?
2 or more simple machines put together to perform a simple task
How are the 3 classes of levers arranged and what do they do?
1) First Class Lever: Multiply force, changes direction 2) Second class levers: Multiply force, no direction change 3) Third Class Lever: Multiply distance, no direction change
What are 3 things machines do?
Machines: Change the amount of force exerted; Change the distance over which force is exerted; Change the direction in which force is exerted