An object has a kinetic energy of 88 J. What is its mass if it is traveling at a speed of 3.9 m/s?
kinetic energy: Ek = 88 J
speed: v = 3.9 m/s
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Starting formula |
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Algebra: multiply each side by 2 |
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Algebra: 2's cancel on right |
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Algebra: divide each side by v^2 |
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Algebra: v^2's cancel on right |
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Algebra: switch left and right sides |
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Plug in numbers with units |
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Math: (2)(88)/(3.9)^2 = 11.571.... |
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Final result with significant figures and unit |
