What effort must be used to lift a 30-pound cat (see the figure above) using a first-class lever? (Don't include the weight of the lever in your calculations.)

The correct answer is A. 10 pounds. See the full explanation below for the reasoning.

Question

What effort must be used to lift a 30-pound cat (see the figure above) using a first-class lever? (Don't include the weight of the lever in your calculations.)

Options

A10 pounds
B15 pounds
C50 pounds
D5 pounds

How the community answered

(36 responses)

A
72% (26)
B
8% (3)
C
17% (6)
D
3% (1)

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