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10 May 2011 13:59:11 IST

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plz tell d difference in methods to solve following questions: Q.1 a sphere of mass m is attached t

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plz tell d difference in methods to solve following questions:Q.1 a sphere of mass m is attached to a string of length l whose other end is fixed to a ceiling. The sphere is made to describe a circle of radius r in a horizontal plane. find tension in the string.Q.2 a ball of mass m is suspended frm a rope of length l. it describes a horizontal circle of radius r wid speed v. the rope makes an angle 't' wid d vertical. find tension in the rope.

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Palanichamy.M

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Joined: 12 Apr 2011

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12 May 2011 20:16:28 IST

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Both are the same problem, with different data. In Q1U have to find sine theta and cos theta using r and l. In Q2 theta the angle is given.

NugoRama

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Joined: 11 Mar 2009

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12 May 2011 20:19:36 IST

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Dont you think the first question is incomplete? It says nothing about the speed.

Palanichamy.M

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12 May 2011 20:34:04 IST

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Only for a particular value of velocity it will have radius "r". radius depend on velocity and velocity depends on radius hence velocity need not be given if r and l are given for a conical pendulum. (provided "g" is assummed.

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