You hit a 0.5 kg tetherball with a force of 10N so that, after it leaves your hand, it travels in a circular motion around the pole. The string is 1 m long and makes an angle of 30 degrees with the pole. What is the tension in the string?

Question

You hit a 0.5 kg tetherball with a force of 10N so that, after it leaves your hand, it travels in a circular motion around the pole.  The string is 1 m long and makes an angle of 30 degrees with the pole.  What is the tension in the string?

anonymous · Answer

|dw:1348791381016:dw|
Always draw first.

anonymous · Answer

NOw, does the problem consider it'll continue moving in circular motion without even stopping?

anonymous · Answer

I think so.  I need to find the sum of the forces in the y-direction, right?  So that's Tcos(30)-mg ?

anonymous · Answer

= 0

anonymous · Answer

Yes, it's in equilibrium at y direction.

anonymous · Answer

And it's T sin30.