koolman Posted December 16, 2015 Posted December 16, 2015 Which force balances centripetal force . For example if we are rotating a ball tied with a string then centripetal force is acting inwards . Then which force balances it . And the centrifugal force is pseudo force.
studiot Posted December 16, 2015 Posted December 16, 2015 Centripetal force is not balanced and an object executing circular motion is not in equilibrium.
koolman Posted December 16, 2015 Author Posted December 16, 2015 Then why will it rotate it would collapse
studiot Posted December 16, 2015 Posted December 16, 2015 (edited) Newton's first Law requires the body to continue movement in a straight line unless acted on by an external force. In the case of circular motion, that force is called centripetal force. Because centripetal force is a real force something has to provide it. That something can be the tension in a string or the force of gravity or an electromagnetic force or a sideways push (reaction) on a moving fluid from a pipe or many other mechanisms. Each one has the general term centrifugal but also a particular name depending upon its source. Edited December 16, 2015 by studiot 2
swansont Posted December 16, 2015 Posted December 16, 2015 A ball revolving around you in circular motion is accelerating. It must be accelerating, or else it would move in a straight line, as studiot has pointed out. Since there must be a net force, you can't have a force balancing it. 1
Carrock Posted December 17, 2015 Posted December 17, 2015 You could also say that you and the ball are stationary and the ball is pulled outwards by gravitational force caused by the relativistic effects of the universe rotating around you.
swansont Posted December 17, 2015 Posted December 17, 2015 You could also say that you and the ball are stationary and the ball is pulled outwards by gravitational force caused by the relativistic effects of the universe rotating around you. But you would be wrong within currently understood physics, so that would be a bad idea.
Carrock Posted December 17, 2015 Posted December 17, 2015 You could also say that you and the ball are stationary and the ball is pulled outwards by gravitational force caused by the relativistic effects of the universe rotating around you. But you would be wrong within currently understood physics, so that would be a bad idea. Seems I was wrong about the meaning of .
swansont Posted December 17, 2015 Posted December 17, 2015 Seems I was wrong about the meaning of . No habla emoji
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