Physics-
General
Easy

Question

A bead is free to slide down a smooth wire tightly stretched between points A and B on a vertical circle. If the bead starts from rest at A, the highest point on the circle

  1. its velocity v on arriving at B is proportional to costheta    
  2. its velocity v on arriving at B is proportional to tantheta    
  3. time to arrive at B is proportional to costheta    
  4. time to arrive at B is independent of theta    

The correct answer is: time to arrive at B is independent of theta

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f left parenthesis x right parenthesis equals open square brackets fraction numerator left parenthesis x minus 2 right parenthesis to the power of 3 end exponent over denominator a end fraction close square brackets s i n invisible function application left parenthesis x minus 2 right parenthesis plus a c o s invisible function application left parenthesis x minus 2 right parenthesis comma open square brackets times close square brackets denotes the greatest integer function, is continuous and differentiable in (4, 6) then.

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