Pulling out nails

This task is about levers.
 
A woodworker has bought some old matai floorboards to re-use as table tops. Some of the nails in the boards are difficult to pull out.
Putting a small wooden block under the head of the hammer gives greater leverage so the nails come out with less effort.

Question 2Change answer

a) Complete the sentence:
 
When the block is used the distance through which the hammer (lever) can pull the nail (load) is
... 

Question 2Change answer

b)  What else could you do to make pulling the nails out easier?

Question 2Change answer

c)  Name another situation where you could use a lever at home or at school.