Pulley Systems: Ideal Mechanical Advantage & Efficiency

[NeedsHelp1212]

Homework Statement

1. How does increasing the load affect the ideal mechanical advantage and efficiency of a pulley system?

2. How does increasing the number of pulleys affect the ideal mechanical advantage and efficiency of a pulley system?

The Attempt at a Solution

My data is all messed up for this lab so just using logic for number 1 I am inferring that for both it would go down due to the increased amount of friction. And for 2 I would say it makes it more efficient, Please verify!

 

[NeedsHelp1212]

could someone take a look at that link and also verify the amount or number of lifting strands on each set up. My lab group put different stuff down then what I think it is. Personally i think A is 1, B is 2, not sure about C or D

 

[NeedsHelp1212]

I need a good grade but here's what i think, As you increase the load the IMA and efficiency both decrease. The problem with my data is the efficiency decreases but the IMA increases..why?

Increasing the number of pulleys increases both the IMA and efficiency, I am def sure about that

And for the number of strands I read on the lab its the number of strings used to the support the load

a- definitely 1

b- has 2

c- has 2

d- has 4

 

[NeedsHelp1212]

Come on guys, this seems easy, i just want to have a little more confidence with my answers

 

[rwisz]

1. Increasing the load in a pulley system will decrease the ideal mechanical advantage and efficiency. This is because as the load increases, the amount of work required to lift it also increases. This results in a decrease in the mechanical advantage, which is the ratio of the output force to the input force. Additionally, as the load increases, there is also an increase in friction within the pulley system, which decreases the efficiency of the system.

2. Increasing the number of pulleys in a pulley system can increase the ideal mechanical advantage and efficiency. This is because with more pulleys, the load is distributed among multiple ropes, reducing the amount of force required to lift the load. This results in a higher mechanical advantage. Additionally, with more pulleys, there are more contact points, which can decrease the amount of friction within the system, leading to a higher efficiency. However, there may be practical limitations to the number of pulleys that can be added to a system, such as the weight and size of the pulleys themselves, which could ultimately limit the potential increase in ideal mechanical advantage and efficiency.