A Uniform Plank of Length 5

Multiple Choice

A uniform plank of length 5.00 m and weight 225 N rests horizontally on two supports.The left support is directly under the left end of the plank and 1.10 m of the plank extends past the right support.How far can a person who weighs 450 N walk on the plank to the right of the right support before the plank just begins to tip?

A) 0.25 m
B) 0.50 m
C) 0.55 m
D) 0.70 m