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What is the speed of a 0.149 kg baseball if its kinetic energy is 107j?
Wiki User
∙ 9y ago
I assume you mean 0.147 kilograms. Use this formula.
KE = 1/2mV2
106 Joules = 1/2(0.147 kg)V2
multiply through by 2
212 = 0.147V2
divide both sides by 0.147
1442.18 = V2
take square root both sides
37.9 m/s = velocity
----------------------------could be 38.0 m/s
Wiki User
∙ 12y ago
Wiki User
∙ 9y agoA Baseball weighs 145 grams 90 mph = 40.23 meters/sec KE = 1/2 mass x v2 = .5 x 145g x (40.23m/s)2 = 72.5g x 1618.45 m2/s2 = 117337.84 g m2/s2 = 117.34 kg m2/s2 = 117.34 Joules
Wiki User
∙ 11y agoDo you mean 46 m/s, or 103 m/s ???
Either way, or anyway the formula is the same.
KE = 1/2mV2
KE = 1/2(0.14 kg)(103 m/s)2
= 743 Joules
=========
Wiki User
∙ 9y agoThe ball has a velocity of 37.9m/s
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