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AP® Physics 1 & 2

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Difficult

Solitary Seesaw

APPH12-FR4KVR

Groups of students in a class are given a fulcrum, a meter stick, and a 200-gram mass to determine the mass of the seesaw. They balance the meter stick on the fulcrum and place the mass on the zero point.

Which group finds the correct mass?

A

$250\text{ grams}$ with the fulcrum at the 30-centimeter point.

B

$75\text{ grams}$ with the fulcrum at the 10-centimeter point.

C

$133\text{ grams}$ with the fulcrum at the 20-centimeter point.

D

$80\text{ grams}$ with the fulcrum at the 40-centimeter point.