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Question

A frictionless track A B C D E ends in a circular loop of radius R. A body slides down the track from point A which is it a height h equals 5 blank c m. Maximum value of R for the body to successfully complete the loop is

  1. 5 blank c m    
  2. fraction numerator 15 over denominator 4 end fraction blank c m    
  3. fraction numerator 10 over denominator 3 end fraction blank c m    
  4. 2 blank c m    

The correct answer is: 2 blank c m


    Condition for vertical looping
    h equals fraction numerator 5 over denominator 2 end fraction r equals 5 c m blank therefore r equals 2 blank c m

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