Chapter 11 21-22 Flashcards
(25 cards)
Distance
length between 2 places
Position
location compared to other things
motion
change in an objects position compared to a fixed object
speed
how fast an objects position changes over time
velocity
description of a moving objects speed and direction
acceleration
a change in the velocity of an object over time
force
any push or pull on an object
friction
force that opposes the motion of an object
Newtons First Law Of Motion
an object at rest tends to stay at rest and an object in motion tends to stay in motion
work
necessary force to move an object through a distance
energy
ability to do work
potential energy
energy stored in an object or material
kinetic energy
energy of motion
thermal energy
heat energy in an object
law of conservation of energy
energy changes from one form to another but cannot be created or destroyed
power
work divided by time
simple machine
machine with few if any moving parts
mechanical advantage
amount of times simple machines multiply advantage force
lever
consists of rigid bar and pivot point
fulcrum
pivot point
wheel and axle
first class lever that has a wheel and a small axle
pulley
grooved wheel that turns by the action of a rope
inclined plane
straight slanted surface
screw
inclined plane wrapped around a bar
