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Question

# Which of the following statements is/are true?

A

Lemon crusher is a Class II lever.

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B

A ramp is an inclined plane.

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C

See-saw is a wheel and axle.

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D

See-saw is a class I lever.

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Solution

## The correct options are A Lemon crusher is a Class II lever. B A ramp is an inclined plane. D See-saw is a class I lever. In a lemon crusher, one end has a pivot about which the arms are free to rotate. The lemon is placed in the region between the pivot and the point where the arms are pressed close together. Hence, a lemon crusher is a Class II lever as the load is in between the fulcrum and the effort. A ramp is an inclined plane. In a see-saw, the fulcrum is in between the two seats where the children sit. Hence, see-saw is a class I lever as the fulcrum is in between the load and the effort.

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