A Student Plays on a See-Saw with Her Experimental Android

question 14

Multiple Choice

A student plays on a see-saw with her experimental android robot, Robby. The student has a weight of 300 N and is seated 2.8 m from the axis of rotation. Robby balances her when he is seated 0.7 m from the axis. Robby's weight is

• A) 1000 N.
• B) 500 N.
• C) 667 N.
• D) 725 N.
• E) 1200 N.

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