A Baseball with the mass of 1500 grams is thrown into the airand reaches the hei

Question

A Baseball with the mass of 1500 grams is thrown into the airand reaches the height of 450 meters. A) Find it's initial velocity of the ball. B) Find the momentum when it hits the ground. C) The kinetic energy before it hits the ground. D) What is the total work? A Baseball with the mass of 1500 grams is thrown into the airand reaches the height of 450 meters. A) Find it's initial velocity of the ball. B) Find the momentum when it hits the ground. C) The kinetic energy before it hits the ground. D) What is the total work?

Explanation / Answer

         Then initial velocity isv0 = sqrt[2hmaxg]                =sqrt[(2)(450m)(9.8m/s^2)]                = 94m/s
B) Momentum when it hits the ground is p = mv             =(1.5kg)(94m/s)             = 141kg m/s
C) Kinetic energy before it hits the ground is =(1/2)(1.5kg)(94m/s)2             =6624J
D) Total work done is equal to the loss in kinetic energy = 66247J               

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