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Introductory Physics Homework Help
How Does Pulling the String Affect the Speed of a Ball in Circular Motion?
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[QUOTE="Simon Bridge, post: 5335012, member: 367532"] Do not copy results from anywhere unless you understand them. You appear to be trying to find an equation to apply. That is a beginner technique and only works when there are not very many equations to memorize - i.e. when you don't know a lot of physics. Use physics instead - the equations will follow. When someone, trying to help you, asks a question - it is usually a good idea to try answering it: ... if there is no external torque on the ball then there is no angular acceleration, so there is no change in the angular momentum. This is exactly the same as the regular F=ma case only with the rotational equivalents. This sort of reasoning is called: "using the physics". The torque is equal to the rate of change of angular momentum - if the torque is zero that means: [/QUOTE]
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Introductory Physics Homework Help
How Does Pulling the String Affect the Speed of a Ball in Circular Motion?
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