More Circular Motion


by PianoMan
Tags: circular, motion
PianoMan
#1
Oct8-03, 08:55 PM
P: n/a
God, I'm getting so frustrated.

A 0.50kg ball that is tied to the end of a 1.5m light cord is revolved in a horizontal plane with the cord making a 30 degree angle with the vertical.

a) what is the ball's speed.

Now, I drew my little diagram, solved for the force of tension (got 5.66N). I plug that in for my Centripetal Force in

Centripetal Force = mv^2/r, solve for v, and got 4.1 . The book gets like, 2.1. I'm getting so frustrated right now...let me know if you can help. Thanks.
Phys.Org News Partner Science news on Phys.org
Going nuts? Turkey looks to pistachios to heat new eco-city
Space-tested fluid flow concept advances infectious disease diagnoses
SpaceX launches supplies to space station (Update)
HallsofIvy
HallsofIvy is offline
#2
Oct9-03, 05:28 AM
Math
Emeritus
Sci Advisor
Thanks
PF Gold
P: 38,881
Did you forget to take the SQUARE ROOT???


Register to reply

Related Discussions
Projectile motion and circular motion questions Introductory Physics Homework 3
Uniform Circular Motion, Rotational Motion, Torque, and Inertia General Physics 1
Question on relative motion and circular motion. Introductory Physics Homework 6
when to use term Rotational motion and Circular motion? General Physics 2
Motion in a Plane question dealing with circular motion Introductory Physics Homework 11