How Does a Conical Pendulum Maintain Constant Velocity?

[sweetygirl]

A small object of mass(m) is suspended from a string of length (L). The object revolves with constant speed (v) in a horizontal circle of radius (r),(Because the sring sweeps out the surface of a cone, the system is known as a conical pendulum).Find that the expression for V (speed) is :

v= square root of (L g sin(theta) tan (theta)

 

[Gokul43201]

What do you need help with? Where are you stuck? We can not help unless you first show us what effort you have made.

 

[sweetygirl]

I need a hint to start!

 

[HallsofIvy]

What are the forces acting on the object? What is the momentum vector of the object at any point in the circle?