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AP® Physics C: Mechanics

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Static Equilibrium: Balancing a Board

APPHMC-MDSHD3

A 15 kg uniform wooden board of length L is balanced at its center. A 6 kg object is to be placed on the right end.

How far from the balance point must a 9 kg object be placed to keep the board in equilibrium?

A

$L/4$

B

$L/3$

C

$L/2$

D

$2L/3$

E

$3L/4$