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20. Exercises

From Mechanics

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===Exercise 20.1===
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A particle, of mass 2 kg, is attached to a fixed point on a smooth horizontal table by a light inextensible string of length 50 cm. The particle travels in a circle on the table at 400 r.p.m. Find the tension in the string.
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</div>{{#NAVCONTENT:Answer|Answer 20.1|Solution|Solution 20.1}}
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===Exercise 20.2===
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A marble is made to rotate against the outside rim of a circular tray of radius 0.2 m. The mass of the marble is 100 grams and it moves at 2 <math>\text{m}{{\text{s}}^{-1}}</math>. Calculate the horizontal force that the tray exerts on the marble.
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</div>{{#NAVCONTENT:Answer|Answer 20.2|Solution|Solution 20.2}}

Revision as of 17:04, 25 November 2009

       Theory          Exercises      


Exercise 20.1

A particle, of mass 2 kg, is attached to a fixed point on a smooth horizontal table by a light inextensible string of length 50 cm. The particle travels in a circle on the table at 400 r.p.m. Find the tension in the string.

Answer | Solution


Exercise 20.2

A marble is made to rotate against the outside rim of a circular tray of radius 0.2 m. The mass of the marble is 100 grams and it moves at 2 ms−1. Calculate the horizontal force that the tray exerts on the marble.

Answer | Solution

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