Machines were invented to have a mechanical advantage, so the work output is always __________ than the work input.
a
less
b
greater
c
harder
d
all of the above
a) less
The correct answer is b) greater.
To understand why the work output is greater than the work input in machines, we need to consider the concept of mechanical advantage. Mechanical advantage refers to the ratio of the output force of a machine to the input force.
Ideally, machines are designed to make work easier by reducing the amount of force required to perform a task. By applying a smaller input force, machines can generate a larger output force to achieve the desired work.
This mechanical advantage allows machines to amplify the force or change its direction, making it easier for humans to perform tasks that would otherwise require more effort. As a result, the work output of a machine is greater than the work input, since the machine allows for the accomplishment of more work with less effort.