Question

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?

Answer 1

Step-by-step explanation:

35 m/s

Answer 2

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 :)