Pulley systems

This task is about investigating pulleys.
Drawn below are two different ways pulleys can be set up, and how a load can be lifted using no pulley.
 
pulley-systems.png
 
Set up each of these systems in turn and measure the force that is required to lift the load in each case.

Question 1Change answer

a)  Complete this table to show your results
Effort needed to raise load in Newtons
Load No pulley Fixed pulley Fixed and moveable pulleys
200g
400g
600g

Question 1Change answer

Effort needed to raise load in Newtons
Load No pulley Fixed pulley Fixed and moveable pulleys
200g
400g
600g
b)  Why are readings taken for lifting the masses (load) i.e., no pulley, using just the force meter?

Question 1Change answer

Effort needed to raise load in Newtons
Load No pulley Fixed pulley Fixed and moveable pulleys
200g
400g
600g
c)  From your results write a conclusion about the effort force needed with the different types of pulleys.

Question 1Change answer

Effort needed to raise load in Newtons
Load No pulley Fixed pulley Fixed and moveable pulleys
200g
400g
600g
d)  Carefully describe two situations in which a pulley system would be useful.
1. 
2.