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For the first class lever, what happens to the to lift a resistance as the effort arm is increased? In a first class lever, explain

  1. For the first class lever, what happens to the to lift a resistance as the effort arm is increased?
  2. In a first class lever, explain how the IMA can equal 1, be greater than 1 and be ;and be less than 1?
  3. In a second class lever why is the IMA always greater than 1?
  4. In a third class lever an effort force larger than the resistance is needed. Why would someone use this type of lever?

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