A Uniform Plank XY Is Supported by Two Equal 120-N

Multiple Choice

A uniform plank XY is supported by two equal 120-N forces at X and Y, as shown.The support at X is then moved to Z (half-way to the plank center) .The supporting forces at Y and Z are then:

A) F_Y = 240 N, F_Z = 120 N
B) F_Y = 200 N, F_Z = 40 N
C) F_Y = 40 N, F_Z = 200 N
D) F_Y = 80 N, F_Z = 160 N
E) F_Y = 160 N, F_Z = 80 N