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Long-Answer Questions
1. What is the moment arm? Explain how
it is useful to increase the moment arm
with reference to the handles of doors
and windows. Give one other example of
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Answer:
Moment arm - it is a lever which is a simple machine with a rigid bar which can rotate about a fixed point or on a fixed line therefore, we can easily able to pull the doors with the help of handles. For example; seesaw, scissors etc.
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