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CBSE Class 11-science Answered

The kinetic energy of a particle depends on the square of speed of the particle. If the error in measurement of speed is 30%, the error in the measurement of kinetic energy will be
Asked by Anil | 17 May, 2017, 09:39: PM
answered-by-expert Expert Answer
begin mathsize 12px style KE space proportional to space straight v squared KE subscript 2 over KE subscript 1 space equals open parentheses space fraction numerator straight v subscript 1 superscript 2 over denominator straight v subscript 2 superscript 2 end fraction space close parentheses Given space that space the space error space in space measure space of space speed space is space 30 percent sign divided by therefore space KE subscript 2 over KE subscript 1 space equals open parentheses space fraction numerator 100 space plus space 30 over denominator 100 end fraction space close parentheses squared space space space space space space space space space rightwards arrow KE subscript 2 over KE subscript 1 space equals space 1.69 rightwards arrow KE subscript 2 equals space 1.69 space KE subscript 1 Percentrage space change space in space kinetic space energy space is fraction numerator KE subscript 2 space minus space KE subscript 1 over denominator KE subscript 1 end fraction space cross times space 100 space equals space fraction numerator 1.69 KE subscript 1 space space minus space KE subscript 1 over denominator KE subscript 1 end fraction space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space equals space 69 percent sign end style
Answered by Yashvanti Jain | 18 May, 2017, 11:59: AM

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CBSE 11-science - Physics
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