Simple machines purpose
machines are made of combination of only
six simple machines
a simple machine that has a slanted surface; a ramp is an example
Inclined plane
the point at which lever pivots
Fulcrum
all objects consist of atoms that constantly
move
adding and removing heat is a way to change the ________ of the substance.
state
machines change two things about work.
the distance over which you do work, and the force required to do work.
a simple machine made of rigid bar that pivots at a fixed point, has two basic parts, a stiff bar that rotates in a fulcrum.
Lever
the fulcrum is somewhere in the middle; the effort forces applied on one side, and the resistance force on the other
First class lever
▪Because All matter moves all matter has
kinetic energy
Heat can be determined by calculating
temperature changes
the six basic machines are
inclined plane, the lever, the pulley, the screw, the wedge, and the wheel and axle.
a simple machine, consisting of a rope or cable that turns around a wheel
Pulley
hear the effort force is between the fulcrum and the resistance force.
Third class lever
the measure of the average kinetic energy of the atoms in an object.
Temperature
an increase in temperature signifies heat, being added; decrease in temperature, identifies heat being
taken away.
the less slanted the inclined plane,
the longer the distance over which the force is exerted.
There are two types of pulleys
fixed and movable.
a lever where the resistance force slides between the fulcrum and the effort force.
Second class lever
how fast the molecules in an object move relates to their
kinetic energy
▪the unit for measuring energy is the joule, but heat energy is often expressed in units called
calories
divide the resistance force by the effort force
Mechanical advantage
combining pulleys can
further reduce the force needed to move an object.
levers are sorted into three classes, according to
the relative position of the fulcrum, the effort force, and the resistance force.
– All matters made of tiny particles that are in constant motion
– The speed of the particles directly corresponds to their temperature
– Had given temperature, the total amount of kinetic energy of the colliding particles remains constant.
Kinetic theory
a substances ability to absorb the kinetic energy of heat
Specific heat