Answer: 6.4 times.
Explanation:
First, remember the definition of work as:
W = F*d
where W is work, F is force and d is distance.
The work applied when using the machine is:
W = 10N*14m = 140J
The work that you would apply if you did not use the machine is:
W' = 180N*5m = 900J.
The ratio W'/W is = 900J/140J = 6.4
This means that the machine has made 6.4 times the work easier. (you needed 6.4 times less work to do the task
