Which of the following statement is NOT true about machines?
a
Machines change the size of a force needed to do the work.
b
Machines decrease the amount of work that is done.
c
Machines change the way work is done.
d
Machines change the direction of a force needed to do the work.
b) Machines decrease the amount of work that is done.
The statement that is NOT true about machines is:
b) Machines decrease the amount of work that is done.
Machines do not decrease the amount of work that is done. Instead, they can make it easier to do work by changing the force needed, the direction of the force, or the way the work is done, but they do not decrease the amount of work.