| A | B |
|---|
| displacement | measured in lengths |
| motion is | displacement, velocity(speed), acceleration |
| velocity is | speed in a given direction |
| acceleration | rate of change in velocity |
| deceleration | decrease in velocity, and can cause change in direction |
| vector | having magnitude and direction |
| conservation of momentum | total movement of an isolated system is always constant |
| newtons first law | objects in motion stay in motion |
| newton's first law part 2 | objects at rest stay at rest |
| newton (N) | unit that represents a force that accelerates mass |
| gravity | force of attraction between all objects of the universe |
| weight | pull of gravity on an object |
| density | mass per unit volume |
| torque | perpendicular force x's the lever arm |
| centrifical force | curvilinear motion directed toward the center |
| newton's secomnd law | the direction of the force vector is the same as the direction of the acceleration vector. |
| newton's third law | For every action there is an equal and opposite reaction. |
| kinetic energy | energy associated w/ motion |
| potential energy | energy stored in a body becuz of position |
| work | product of force applied to an object |
| joule | unit of energy = to work done by force of 1 newton over a distance of 1 meter |
| power | rate at which work is done |
| machine | device that makes work easier |
| inclined plane | slanted surface used to raise objects |
| wedge | moving inclined plane |
| screw | inclined plane wrapped around a cylinder |
| lever | simple machine & is free to move around a fulcrum when force is applied |
| pulley | chain or rope wrapped around a wheel |
| wheel and axel | acts as a lever that rotates in a circle |
| compound machine | combo of 2 or more simple machines |
