Physics-
General
Easy

Question

Two smooth tracks of equal length have “bumps”-- A up, and B down, both of the same curvature and size. The two balls start simultaneously with the same initial speed = 3 m/s. If the speed of the ball at the bottom of the curve on track B is 4 m/s, then the speed of the ball at the top of the curve on track A is

  1. = 2 m/s    
  2. > 2 m/s    
  3. < 2 m/s    
  4. not enough information given    

The correct answer is: = 2 m/s

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