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ryzh [129]
2 years ago
14

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?

Physics
2 answers:
Gnoma [55]2 years ago
8 0
ME = PE + KE
ME = mgh + 1/2mv^2
105.8 J = (0.145)(9.81)(12m) + (1/2)(0.145)(v^2)<- what you need to solve for
105.8 J = 17.07 + 0.0725v^2
105.8 J - 17.07 = 0.0725v^2
88.73 = 0.0725v^2
88.73/0.0725 = v^2
1223.86 = v^2
√1223.86 = v
34.98 = v or v = 34.98

hope this helps :)
Marat540 [252]2 years ago
6 0

the correct answer is 35 on edge

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