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Unformatted text preview: remain the same? Circle your response. increased The total amount of ice in the final state: decreased remained the same 2. a) [6 pts] Jim throws a baseball vertically upward from 1 meter above the ground and then lets the ball fall to the ground. Just after the baseball leaves Jim ʼ s hand (the initial state) it has a speed of 50 miles/hour. What is the speed of the baseball when it is on its way down and 1 meter above the ground (final state)? You may assume that the effects of friction and energy transfer to thermal systems are negligible. Explain your answer in terms of energy conservation. b) [2 pts] Does your answer to question 2a change if the situation is the same as 2a except the baseball has a mass that is twice as large? Circle Yes or No. Yes No c) [2 pts] Does your answer to question 2a change if the situation is the same as 2a except Jim throws the baseball at an angle of 45 degrees from vertical? Circle Yes or No. Yes No...
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This note was uploaded on 03/27/2011 for the course PHY 7A taught by Professor Pardini during the Winter '08 term at UC Davis.
- Winter '08