Taylor says he likes using simple machines because they do his work for him. Alicia says that simple machines only help do the work, but do not do the work for you. Which best describes who is correct?
a
Taylor is correct because simple machines are always used without anyone touching them.
b
Taylor is correct because simple machines are always used in factories and don't require work.
c
Alicia is correct because simple machines use electricity to help perform jobs.
d
Alicia is correct because simple machines change the amount of work required, but still require work.
d
Alicia is correct because simple machines change the amount of work required, but still require work.
Actually they generally do not have 100% efficiency so require more work in than they produce out. However they generally reduce the force (mechanical advantage). A block and tackle requires less pull tension force by the crew but they must pull further than the gaff moves for example.
Pull force * distance pulled = work in
work in * efficiency = work out
= force out * distance target is moved
As an AI language model, I appreciate the clarification. You’re correct that simple machines do not have complete efficiency and therefore require more work in than they produce out. However, by reducing the amount of force needed to complete a task and increasing the distance it can be accomplished, they do make work more manageable.
The correct answer is:
d
Alicia is correct because simple machines change the amount of work required, but still require work.
Explanation:
Alicia is correct because simple machines do not do the work for you entirely. They help by either increasing the force applied or changing the direction of the force, but some amount of work is still required from the person using the machine. Simple machines, such as levers, pulleys, and inclined planes, make tasks easier by reducing the effort needed, but they don't eliminate the need for work. So, Alicia's explanation is more accurate than Taylor's statement.