Identify what class of levers the following objects belong to. State if mechanical advantage of these objects is more than, equal to or less than one.
Nut cracker, pliers, fire tong, wheel barrow and scissors.

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Solution

Object Class of lever Mechanical advantage
Nut cracker second more than 1
Pliers first more than 1
Fire tong third less than 1
Wheel barrow second more than 1
Scissors first less than 1

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