Physics-
General
Easy

Question

A ball is thrown up at an angle with the horizontal. Then the total change of momentum by the instant it returns to ground is

  1. Acceleration due to gravity cross times total time of flight  
  2. Weight of the ball cross times blank half the time of flight  
  3. Weight of the ball cross times blank total time of flight  
  4. Weight of the ball cross times blank horizontal range  

The correct answer is: Weight of the ball cross times blank total time of flight


    Change in momentum of the ball equals m v sin invisible function application theta minus left parenthesis negative m v sin invisible function application theta right parenthesis
    equals 2 m v sin invisible function application theta equals 2 m g v fraction numerator sin invisible function application theta over denominator g end fraction equals m g cross times fraction numerator 2 v sin invisible function application theta over denominator g end fraction
    equals blankweight of the ball cross times total time of flight

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