| A | B |
|---|
| Pressure | force pushing on a surface |
| Less surface area | greater the pressure |
| Buoyant force | a force that is exerted on a submerged object; acts in an upward direction |
| Archimede's Principle | the bouyant force of an object is equal to the weight of the fluid displaced by the object |
| density | mass per unit of volume |
| volume | space with in an object |
| Bernoulli's Principle | the pressure exerted by a moving stream of fluid is less than the pressure of the surrounding fluid moving |
| work | when you exert a force on an object and make it move a distance |
| joule | the unit used to describe work |
| machine | a device which makes doing work easier or more effective |
| input force | the effort force or the force exerted on the machine |
| output force | resistance force or the force exerted by the machine |
| mechanical advantage | number of times a force exerted on a machine is multiplies by the machine |
| inclined plane | a flat surface that helps objects change elevation |
| wedge | a simple machine that cuts or splits objects |
| screw | an inclined plane wrapped around a cylinder helps hold things |
| lever | helps move objects it is a rigid bar that moves around a fulcrum |
| fulcrum | the fixed point of a lever |
| wheel and axel | made of two circular objects that work together to move things |
| pulley | a wheel and cord, wire, or cable that helps move things up down or across |
| compound machine | a machine that uses two or more simple machines |
| energy | the ability to do work or cause change |
| kinetic energy | moving energy |
| potential energy | stored energy |
| mechanical energy | energy associated with motion |
| thermal energy | total energy of the particles in an object; heat energy |
| chemical energy | potential energy stored in chemical bonds |
| electrical energy | moving electrical charges (electricity) |
| electromagnetic energy | energy that travels in waves light is an example |
| nuclear energy | potential energy stored in the nucleus of an atom |
| energy conversion | a change from one form of energy to another |
| law of conservation of energy | states that energy can not be created of destroyed |
