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You try and whirl a 1.0 kg mass on a 1.0 meter long string, at constant...

You try and whirl a 1.0 kg mass on a 1.0 meter long string, at constant speed in a horizontal circle. However, you find that the string is at an angle of 37 degrees below the horizontal because of gravity. How fast is the mass moving in m/s?

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Answer #1

From the figure, radius of circle is , length of string is ,

Net force acting on the mass in the vertical direction is zero,

Net force acting on the mass in the horizontal direction is

Speed of mass is

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