A rod which is in XY horizontal plane is released from its position with its one end fixed. Gravity acts in the direction of negative z-axis. At time t, the rod is making an angle θ with the z-axis.
I am getting a strong feeling that the angle made by the rod with x-axis, or the angle made by the plane containing the rod and the Z-axis and the XY plane is 90 - θ.
However, my textbook is considering that angle to be independent angle Φ
Then the coordinates of the other end of the rod is given as
x = l sinθ cosΦ
y = l sinθ sinΦ
z = l cosθ
Is my assumption correct?
[UPDATE] - Its given that it is set rotating about the vertical axis with angular velocity ω, but will, or can this impact the answer?