A 10-M Long Plank (Of Negligible Mass)is Supported at Each

Multiple Choice

A 10-m long plank (of negligible mass) is supported at each end by vertical cables.A person of unknown weight sits on the plank between the cables.The tension in the left cable is 300 N,and in the right cable it is 200 N.How far is the person sitting from the left cable?

A) 2.0 m
B) 3.0 m
C) 4.0 m
D) 6.0 m
E) 7.0 m