A 4-Kg Mass Is Connected to a 6-Kg Mass by a Massless

Multiple Choice

A 4-kg mass is connected to a 6-kg mass by a massless cord. A 120-N upward force is applied to the 4-kg mass, causing both masses to accelerate upward. The tension in the massless cord is

A) 60 N.
B) 48 N.
C) 40 N.
D) 72 N.