Question |
Answer |
acceleration |
The change in velocity during a period of time. |
block and tackle |
An arrangement of fixed and movable pulleys connected by ropes. |
compound machine |
A machine that combines two or more simple machines. |
distance |
The amount of space traveled from where an object starts to where it is at any given moment. |
effort force |
The force applied to a simple machine. |
fixed pulley |
A type of pulley that is attached to something so that the pulley does not move; it changes the direction of a force. |
friction |
A force that keeps objects from moving. |
fulcrum |
The fixed point on which a lever turns. |
gravity |
The pull of one object on another. |
inclined plane |
A simple machine consisting of a flat, slanted surface, such as a ramp. |
inertia |
The resistance to a change in motion. |
joule |
The unit used to measure work; equal to one newton meter of work. |
lever |
A simple machine consisting of any bar that turns on a fulcrum. |
mechanical advantage |
The ability to get something moving |
mechanical energy |
The decrease in effort needed to move an object. |
momentum |
The mass and velocity (speed and direction) of an object. |
motion |
Change of an object's position |
moveable pulley |
A type of pulley that moves along a rope where the effort is above the pulley. |
newton |
The unit used to measure force (weight). |
pulley |
Simple machine consisting of a wheel with a chain or rope wrapped in the groove of the wheel. |
reference point |
A fixed, unmoving object needed to determine whether another object has changed position |
screw |
A simple machine consisting of an inclined plane that is wound around a cylinder or cone. |
speed |
The rate at which an object travels; determined by dividing the distance by the amount of time the object takes to travel that distance |
velocity |
The distance an object moves over a given amount of time in a certain direction. |
wedge |
A simple machine consisting of two inclined planes back-to-back. |
wheel and axle |
A simple machine consisting of a wheel and a rod running through the axle. |
work |
A force acting on something and moving it a distance. |
Resistance force |
The force that works against the effort |
Machine |
Any object that makes work easier |