An object of mass m swings in a horizontal circle on a string of length L that tilts downward at angle theta. Find an expression for the angular velocity w.

(B) A student ties a 500g rock to a 1.0m long string and swings it around her head in a horizontal circle. At what angular speed, in rpm, does the string tilt down at a 10 degree angle?

Question

An object of mass m swings in a horizontal circle on a string of length L that tilts downward at angle theta. Find an expression for the angular velocity w.

(B) A student ties a 500g rock to a 1.0m long string and swings it around her head in a horizontal circle. At what angular speed, in rpm, does the string tilt down at a 10 degree angle?

anonymous · Answer

|dw:1393479901612:dw|
now.. can u resolve the forces and tell how much centripetal force the ball experiences?