1. A pitcher throws a baseball with mass 0.2 kg straight upward with an initial speed of 20.0 m/s. (a) How much work (in J) has gravity done on the baseball when it reaches a height of 15.0 m above the pitcher’s hand? Note: Consider the direction of the gravity. (b) Calculate the speed (in m/s) of the baseball at a height of 15.0 m above the pitcher’s hand.
1. A pitcher throws a baseball with mass 0.2 kg straight upward with an initial speed of 20.0 m/s. (a) How much work (in J) has gravity done on the baseball when it reaches a height of 15.0 m above the pitcher’s hand? Note: Consider the direction of the gravity. (b) Calculate the speed (in m/s) of the baseball at a height of 15.0 m above the pitcher’s hand.
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1. A pitcher throws a baseball with mass 0.2 kg straight upward with an initial speed of 20.0 m/s.
(a) How much work (in J) has gravity done on the baseball when it reaches a height of 15.0 m above the pitcher’s hand?
Note: Consider the direction of the gravity.
(b) Calculate the speed (in m/s) of the baseball at a height of 15.0 m above the pitcher’s hand.
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