A small bob of mass m attached to an elastic cord revolves in a horizontal frictionless table with n revolutions per second.If the unstretched length of the cord be "L" and the tension in the cord increases in direct proportion to its elongation.
find
a) The radius of the cirlce described by the bob
b) The tension in the cord
tension per unit elongation is "c"...
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1 Answers
62A small bob of mass m attached to an elastic cord revolves in a horizontal frictionless table with n revolutions per second.If the unstretched length of the cord be "L" and the tension in the cord increases in direct proportion to its elongation.
find
a) The radius of the cirlce described by the bob
b) The tension in the cord
tension per unit elongation is "c"...
Let the new length be L+x
tension will be cx
also mv2/(L+x) = cx
now can you solve the quadratic to get x?
then tension is given by cx
radius is given by L+x