Forces in Motion
A force that opposes the motion of objects that touch as they move past each other.
Friction
the rate at which an object is moving at a given moment in time
Instantaneous speed
a v-shaped object whose sides are two inclined planes sloped toward each other
wedge
primary colors of light
red green and blue
Used in radio and television technologis as well as in microwave ovens and radar
radio waves
The speed and direction an object is moving, measured relative to a reference point.
Velocity
As the speed of a fluid increases the pressure within the fluid decreases
Bernoulli's Princple
the fixed point a lever rotates around
fulcrum
a description of a material that scatters light that passes through it
translucent
the full range of frequencies of electromagnetic radiation
electromagnetic spectrum
The product of an object's mass and its velocity
Momentum
the tendency of an object to resist change in its motion
inertia
a machine that uses only one movement
simple machine
the bending of a wave as it enters a new medium at an angle
refraction
applications in health, medicine, and agriculture.
ultraviolet rays
The product of the distance and the force in the direction an object moves
Work
air resistance
the percentage of the work input that becomes work output in a machine
efficiency
a description of a material that either absorbs or reflects all of the light that strikes it so nothing can be seen through it
opaque
gamma rays
a friction force that opposes the motion of an object as it slides over a surface
sliding friction
the ability of a fluid to exert upward force on an object placed in it
buoyancy
the number of times that a machine increases an input force
Mechanical advantage
the interaction that occurs when a wave bounces off a surface that it cannot pass through
reflection
used as a source of heat and to discover areas of heat differences
infrared rays