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The line among the following that touches the y to the power of 2 end exponent equals 4 a x is

Maths-General

  1. x plus m y plus a m cubed equals 0    
  2. x minus m y plus a m to the power of 2 end exponent equals 0    
  3. x plus m y minus a m squared equals 0    
  4. y plus m x plus a m to the power of 2 end exponent equals 0    

    Answer:The correct answer is: x minus m y plus a m to the power of 2 end exponent equals 0

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    A thin uniform annular disc (see figure) of mass M has outer radius 4 R and inner radius 3 R. The work required to take a unit mass from point P on its axis to infinity is

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    equals negative fraction numerator 2 G M over denominator 7 R end fraction open parentheses 4 square root of 2 minus 5 close parentheses
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    equals fraction numerator 2 M r d r over denominator 7 R to the power of 2 end exponent end fraction
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    equals negative fraction numerator 2 G M over denominator 7 R to the power of 2 end exponent end fraction not stretchy integral subscript 3 R end subscript superscript 4 R end superscript fraction numerator r over denominator square root of 16 R to the power of 2 end exponent plus r to the power of 2 end exponent end root end fraction bullet d r
    equals negative fraction numerator 2 G M over denominator 7 R end fraction open parentheses 4 square root of 2 minus 5 close parentheses
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