2018/2019 TCS FAIRFAX PHYSICAL SCIENCE 11.1 TERMS WORK AND POWER, 2018/2019 TCS FAIRFAX PHYSICAL SCIENCE 11.2 TERMS UNDERSTANDING MACHINES, 2018/2019 TCS FAIRFAX 11.3 TERMS INCLINED PLANES AND LEVERS, 2018/2019 TCS FAIRFAX 11.4 TERMS PUTTING MACHINES...

joule

the amount of work you do when you exert a force of 1 newton to move an object a distance of 1 meter; a unit of work equal to one newton-meter

power

the rate at which one form of energy is transformed into another; the rate at which work is done

watt

the unit of power when one joule of work is done in one second; 1 J/s \= 1 W

work

force exerted on an object that causes it to move

efficiency

the % of the input work that is converted to output work

input force

the force exerted on a machine

machine

a device that changes the amount of force exerted, the distance over which a force is exerted, or the direction in which force is exerted

mechanical advantage

the \# of times a machine increases a force exerted on it

output force

the force exerted on an object by a machine

fulcrum

the fixed point around which a lever pivots

inclined plane

a simple machine that is a flat, sloped surface

lever

a simple machine that consists of a rigid bar that pivots about a fixed point

screw

a simple machine that is an inclined plane wrapped around a central cylinder to form a spiral

simple machine

the most basic device for making work easier; these are the smaller building blocks for complex machines

wedge

a simple machine that is an inclined plane that moves

compound machine

a device that combines two or more simple machines

pulley

a simple machine that consists of a grooved wheel with a rope or cable wrapped around it

wheel and axle

a simple machine that consists of two attached circular or cylindrical objects that rotate about a common axis, each one with a different radius