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AP® Physics C: Mechanics

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Moderate

Center of Mass: Masses on a See-saw

APPHMC-SBEJSP

Three objects are placed on a massless seesaw. A $1 kg$ object is placed at $x = 3 m$ and a $2 kg$ object at $x = -2 m$. The fulcrum of the seesaw is at $x = 0m$.

Which of the following mass / location combinations would balance the seesaw?

A

No additional weights are necessary.

B

$m = 0.25 kg, x = -4 m$

C

$m = 3 kg, x = 0.5 m$

D

$m = 2 kg, x = 0.5 m$

E

$m = 1 kg, x = -1 m$