alleryA fixed pulley mainly changes the effort's:
AMagnitude
BFrequency
CTemperature
DDirection
Answer & Solution
Correct answer: D. Direction
1. Pulling down is easier than pulling up.
2. The size of the force needed stays the same.
3. A fixed pulley only changes the direction of the effort.
4. So the answer is direction.
_Source: syllabus Science, Ch 7 'Work, Energy, and Simple Machines'_
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