Imagine that a machine enables you to do 100 joules of work with a force input of 20 newtons. Now imagine that a new machine is invented that lets you do the same amount of work with a force input of just 10 newtons. The NEW machine makes you how many times stronger than the old one?
a. one-half as strong
b. twice as strong
c. three times as strong
d. ten times as strong
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