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26 Cards in this Set

  • Front
  • Back
force
a push or a pull that causes changes in motion
friction
a force that works against motion
gravity
the attraction between you andearth
gravitational force
all objects in the universe pull on one another
magnetic
an object that attracts iron
magnetic force
the force exerted by a magnet
balanced forces
forces that act on an object but cancel eachother
unbalanced forces
forces in one direction are stronger, so they dont cancel eachother
net force
a combination of all the forces acting on an object
buoyant force
an upward force
work
using an object to move through a distance
simple machine
a tool that makes a task easier by changing the strength or direction of a force or the distance over which the force acts
lever
a bar that makes it easier to move things
fulcrum
a balance point
wheel-and-axle
helps you open a door
pulley
a wheel with a groove for a rope
inclined plane
allows you to use less force over a distance to make work easier
position
the location of an object in space, and it is always relative to a frame or reference
speed
the distance an object travels in a certainamount of time
velocity
the measure of an objects speed in a particular direction
acceleration
the rate at which velocity changes over time
inertia
the tendancy of objects to resist a change in motion
vibration
a back and forth movement of matter
volume
the loudness of sound
pitch
a sound of how high or low it is
frequency
the number of vibrations in a second