(890) Problem 12. A basketball player throws a basketball Pn = 1 kg straight up
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(890) Problem 12. A basketball player throws a basketball Pn = 1 kg straight up with an initial speed of v0 leaves his hand at shoulder height ho-1.7 m. Let gravitational potential energy be zero at ground level. 8.5 m/s. The ball * 50% Part(a) Give the total mechanical energy of the ball E in terms of maximum height h n it reaches the mass m and the gravitational acceleration g Grade Summa Deductions Potential E=10+9.8 hmi 0% 100% 7 89 HOME Submissions Attempts remaining: 16 detailed view (000 per attempt) 0% 0% 096 096 END Vo NO BACKSPACE DE CLEAR Submit Hint I give up! Hints: 2 for a 0% deduction. Hints remaining: 1 Feedback: 0%-deduction per feedback. -At its maximum height, does the ball have kinetic energy? -What is the gravitational potential energy at h 50% Part (b) What is the height, hm in meters?Explanation / Answer
(A) total mechanical energy = m g hm
(B) from energy conservation,
total height at time of launch = m g h0 + m v0^2 / 2
m g hm = m g h0 + m v0^2 / 2
9.81 hm = (9.81 x 1.7) + (8.5^2 / 2)
hm = 5.38 m .......Ans
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