CLICK HERE FOR INDEX PAGE

PULLEYS AND LIFTING - QUESTIONS 1

V. Ryan 2004 - 2012

 

PDF FILE - CLICK HERE FOR PRINTABLE WORKSHEET

 

1a. A simple pulley system is shown opposite. A 40N effort is used to move a 80N load. The final effort moves 2 metres and at the same time the load moves 1 metre.

 
 

1b. Work out the efficiency of the pulley system.

It is important to remember that NO pulley system is 100% efficient. This is due to friction of the ropes against the pulley wheels and the friction of the bearings of the pulley wheels as they rotate. 100% efficiency is only theoretical..

   

   

The calculations for example 2 are seen below. This type of pulley arrangement will always have the same mechanical advantage and velocity ratio.

   
 
   

CLICK HERE FOR NEXT PULLEYS AND LIFTING PAGE

   

CLICK HERE FOR GEARS AND PULLEYS SYSTEMS INDEX PAGE

   
 
Google
 
Web www.technologystudent.com