A 275 g ball falls vertically downward, hitting the floor witha speed of 2.7 m/s

Question

A 275 g ball falls vertically downward, hitting the floor witha speed of 2.7 m/s and rebounding upward with a speed of 2.2m/s. A) Find the magnitude of the change in the ball's momentum inkg*m/s B) Find the change in the magnitude of the ball'smomentum in kg*m/s C) Which of the two quantities calculated in parts A and B ismore directly related to the net force acting on the ball duringits collision with the floor? D) Explain your answer to part C A 275 g ball falls vertically downward, hitting the floor witha speed of 2.7 m/s and rebounding upward with a speed of 2.2m/s. A) Find the magnitude of the change in the ball's momentum inkg*m/s B) Find the change in the magnitude of the ball'smomentum in kg*m/s C) Which of the two quantities calculated in parts A and B ismore directly related to the net force acting on the ball duringits collision with the floor? D) Explain your answer to part C

Explanation / Answer

Final speed Vf = 2.2 m/s
Change in momentum = m (Vf - Vi)
      = (0.275) [2.2 - ( - 2.7) ]
      =1.3475kgm/s
b) inital momentum Pf = 0.275(2.7) = 0.7425 m/s    Final momentum Pi = 0.275 (2.2) =0.605
Change in magnitude of momentum is
   = 0.605 -0.7425
   = - 0.1375kgm/s
    c) part (a)
d) According to impluse momentum theorem
   F. t = m ( Vf - Vi )
  Force is related to magnitude of change inmomentum.

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