scramble 1
the ability to do work
energy
the energy of an object due to its motion
kinetic energy
the force a person exerts on a machine
input force
the force exerted by a machine
output force
objects that can stretch or compress and then return to their original shape have
potential energy
energy that is stored as a result of position or shape
potential energy
KE is directly proportional to the
square of the speed
the distance the input force is applied
input distance
the distance the output force is exerted through, or how far the load moves
output distance
Sunlight is an example of electromagnetic energy which is energy ......
carried in waves through space
Work is the product of...
force and distance
The law of conservation energy cannot be ______ or _______.
created or destroyed
_____________ is converted to kinetic energy as the raindrop falls
gravitational potential energy
___________ is energy stored in the bonds between atoms or molecules
chemical energy
frictional forces convert kinetic energy into ______ which is why hands feel warm when you briskly rub them together for a while
thermal energy
Work can be defined as a transfer of _________.
energy
In machines, because of friction, work output is always _____ than work input.
less
_____ is the unit of work and energy.
joule
What is the SI unit of power?
watt
Why is the efficiency of a machine always less than 100%?
some work input is lost to friction
What kind of energy is stored in gasoline?
Chemical energy
A screw is an _____ ______ wrapped around a central axis.
incline plane
Power is equal to work divided by _____.
time
What does the power of a machine measure?
its rate of doing work
An ax is an example of what type of simple machine?
a wedge