A Conical Pendulum Is Constructed with a String 2

Multiple Choice

A conical pendulum is constructed with a string 2.5 m in length.The pendulum is set in horizontal circular path about the vertical axis.If the angular velocity of the conical pendulum is a constant 2.8 rad/s,then the angle the string makes with the vertical axis is

A) 48 degrees.
B) 60 degrees.
C) 71 degrees.
D) 75 degrees.
E) 80 degrees.