Physics-
General
Easy

Question

A box of mass m is released from rest at position 1 on the frictionless curved track shown. It slides a distance d along the track in time t to reach position 2, dropping a vertical distance h. Let v and a be the instantaneous speed and instantaneous acceleration, respectively, of the box at position 2. Which of the following equations is valid for this situation?

  1. h = vt    
  2. h equals left parenthesis 1 divided by 2 right parenthesis g t to the power of 2 end exponent    
  3. d equals left parenthesis 1 divided by 2 right parenthesis a t to the power of 2 end exponent    
  4. m g h equals left parenthesis 1 divided by 2 right parenthesis m v to the power of 2 end exponent    

The correct answer is: m g h equals left parenthesis 1 divided by 2 right parenthesis m v to the power of 2 end exponent

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