Machines

device that changes a force

3 things a machine can change

due to _ _ _ the work done by the machine is always _ _ _ than the work being done on the machine

the force you exert on a machine

the distance the input force acts through

work done by input force and input distance

force exerted by a machine

the number of times that a machine increases an input force

MA of a machine determined by measuring the actual forces acting on it

formula for actual mechanical advantage

what are the 6 kinds of simple machines?

rigid bar that is free to move around a fixed point

fixed point that the bar rotates around

distance from input force to fulcrum

distance between output force and fulcrum

formula for ideal mechanical advantage

where the _ _ _ is determines the type of lever

fulcrum is between the input force and output force

example of 1st class lever

output force is between fulcrum and input force

example of 2nd class lever

when the input force is between the fulcrum and the output force

simple machine made of two circular objects each with a different radius that rotate on a common axle

example of wheel and axle

slanted surface along which a force moves an object to a different elevation

example of inclined plane

a device that is thick at one end and tapers to a thin edge at the other end

example of wedge

the longer and thinner the wedge, the _ _ _ the mechanical advantage

inclined plane wrapped around a cylinder

example of screw

simple machine that consists of a rope wrapped around a groove in a wheel

a wheel attached to a fixed location

example of fixed pulley

fixed pulley only changes in the direction of the _ _ _ force

attached to the object being moved; not a fixed location

example of moveable pulley

moveable pulley changes _ _ _ and _ _ _ of input force

combining fixed and moveable pulleys

combination of two or more simple machines working together

example of compound machine