To open the lid of bottle, 50 N force is needed, Siri wanted to open the lid with her maximum effort of 10 N, which of the following openers is suitable for doing it?

To open the lid of bottle, 50 N force is needed, Siri wanted to open t

1.	To open the lid of bottle, 50 N force is needed, Siri wanted to open the lid with her maximum effort of 10 N, which of the following openers is suitable for doing it?
Answer» SOLUTION : `M_(A)=(10)/(2)=5` `M_(B)=(8)/(2)=4` `M_(C)=(15)/(3)=5` `E_(A)=(L)/(MA)=(50)/(5)=10N` `E_(B)=(L)/(MA)=(50)/(4)=12.5N` `E_(C)=(L)/(MA)=(50)/(5)=10N` She can use opener A or C to OPEN the lid.