Machines
a ____ is a flat, sloped surface
inclined plane
Energy must have the ability to cause
change
Bottle opener, scissors, and seesaws
lever
two or more simple machines working together are a
compound machines
Conversion of energy from one form to another.
energy transformation
A pulley is this type of machine
Simple
Stored energy that depends on the interaction of objects, particles, or atoms
potential energy
force perpendicular to the motion means
zero work being done
Ratio of output working to input work
efficiency
The energy carried by the elctromagnetic waves that operate radios and microwaves
Radiant Energy
The rope or cable with a grooved wheel wrapped around it
Pulley
Object that has energy because it is in motion
Kinetic energy
the ratio of output force to input force
mechanical advantage
force and energy are measured in ___ and ___
(SPECIFY WHICH IS WHICH)
joules, newtons
A hairdryer converts electrical energy to
mechanical and thermal energy
_____ are machines that do work using one movement.
simple machines
Transfer of energy that occurs when a force makes an object move in the direction of the force while the force acts on the object.
Work
Expressed as a percentage of the work being done
Efficiency
energy cannot be created or destroyed, only transferred or converted
law of conservation of energy
____ convert mechanical energy into thermal energy
friction and air resistance
machines help us do work by
increase speed, increase force, change direction
name the three types of potential energy
GPE - gravitational
epe - elastic
cpe -chemical
a doorknob, a car's steering wheel, and screwdriver is what type of machine.
wheel and axle
the rate that energy is converted
power
what is the energy conversion in plants
radiant energy into chemical potential