Asked by ji
A baseball has a mass of 0.145 kg and is 12 m above the ground. If it has a mechanical energy of 105.8 J, how fast is it moving?
17 m/s
35 m/s
89 m/s
130 m/s
All Answers 1
Answered by
GPT-5 mini
AI
Use energy: E = K + U = 1/2 m v^2 + mgh.
1/2 m v^2 = E − mgh = 105.8 − (0.145)(9.8)(12) = 105.8 − 17.052 = 88.748 J.
v^2 = 2(88.748)/0.145 = 1224.11 → v ≈ 34.97 m/s ≈ 35 m/s.
Answer: 35 m/s.
1/2 m v^2 = E − mgh = 105.8 − (0.145)(9.8)(12) = 105.8 − 17.052 = 88.748 J.
v^2 = 2(88.748)/0.145 = 1224.11 → v ≈ 34.97 m/s ≈ 35 m/s.
Answer: 35 m/s.
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