Question

Compare the amount of work done when one man uses an ideal pulley to lift a 500 newton weight 2 meters and one man lifts a 500 newton weight 2 by hand.

Select one:
a. Depends on the number of pulleys.
b. More work is done when one man lifts the weight by hand.
c. More work is done when one man lifts the weight using a pulley.
d. The amount of of work is the same with or without the lifting pulley.

Answer 1

More work is done when one man lifts the weight using a pulley. Option C is correct.

What is mechanical advantage ?

Mechanical advantage is a measure of the ratio of output force to input force in a system, it is used to obtained efficiency of  forces in levers and pulley.

It is an effective way of amplify the force in simple machines like lever  The theoretical mechanical advantage is defined as the ratio of the force responsible for the useful work in the system  to the applied force.

More work is done when one man lifts the weight using a pulley. With the pulley, the mechanical advantage is increasing.

Hence, option C is correct.

To learn more about the mechanical advantage, refer to the link;

https://brainly.com/question/7638820

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