What interests you about work and machines? Work is the transfer of energy that occurs
when a force makes an object move. Work is important because it applies to a
lot of things, like a machine. A machine is a device that makes doing work
easier. Power is included in this because power is the amount of work done in
one second, like if you and your friend push a box that weighs the same up an
inclined plane both of you are doing the same amount of work but if you finish
before your friend then you have more power.
Input and output
force are also applied to this, the output force is the force applied by the
machine. The input force is the force applied to the machine. An example of
input and output force is pulling a nail out of a board, you pulling the hammer
back is the input force and the nail coming out is the output force. Efficiency
is the measure of how much work put into a machine is changed into a useful
output work by the machine. A few things about work and machines that I think
are interesting are that there are many different machines that help reduce
work. Another thing is that like an inclined plane isn't just a ramp like the
definition said, it could also be a zigged zagged hill, or many other things.
This
is a picture of a machine (a pulley), doing work. It is reducing the workload
for the guy. The box isn’t as heavy if he has the machine to help.
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