Tasha Has Mass 20 Kg and Wants to Use a 4.0-M

Multiple Choice

Tasha has mass 20 kg and wants to use a 4.0-m board of mass 10 kg as a seesaw.Her friends are busy,so Tasha seesaws by herself by putting the support at the system's center of gravity when she sits on one end of the board.How far is she from the support point?

A) 2.0 m
B) 1.0 m
C) 0.67 m
D) 0.33 m