Register to reply

Some doubts regarding rotational dynamics

by dreamz25
Tags: doubts, dynamics, rotational
Share this thread:
dreamz25
#1
Mar9-12, 09:16 AM
P: 26
a) suppose we tie a ball with a string and rotate it keeping its other end tied with one of our fingers then the only external force acting on it is the tension. Which force then cancells 'mg' acting vertically downward?

b) if a mass is rotating in a circular path then in which direction does the net external force acting on it acts?
Phys.Org News Partner Physics news on Phys.org
UCI team is first to capture motion of single molecule in real time
And so they beat on, flagella against the cantilever
Tandem microwave destroys hazmat, disinfects
Doc Al
#2
Mar9-12, 09:21 AM
Mentor
Doc Al's Avatar
P: 41,564
Quote Quote by dreamz25 View Post
a) suppose we tie a ball with a string and rotate it keeping its other end tied with one of our fingers then the only external force acting on it is the tension. Which force then cancells 'mg' acting vertically downward?
Not exactly sure what you are describing. But if you twirl the ball on the end of a string in a horizontal circle, the string will make an angle with the horizontal. The net vertical force will be zero.
b) if a mass is rotating in a circular path then in which direction does the net external force acting on it acts?
What do you think?


Register to reply

Related Discussions
Rotational Dynamics Introductory Physics Homework 1
Rotational Dynamics Introductory Physics Homework 1
Rotational Equilibrium and Rotational Dynamics problem Introductory Physics Homework 1
Rotational Dynamics Introductory Physics Homework 1
Rotational Equilibrium and Rotational Dynamics Introductory Physics Homework 1