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MHT CET202019 Oct 2020Morning ShiftPhysicsMathematics in PhysicsActual

The percentage errors in measurements of mass and speed of a body are 2 % and 3 % respectively. What is the percentage error in kinetic energy of the body?

Options

  1. A9 %
  2. B5 %
  3. C8 %
  4. D0 %

Correct answer

C. 8 %

Step-by-step solution

(C) Given percentage errors in mass and velocity =2 % and 3 % respectively The kinetic energy of the particle is given by KE = mv ² 2 The percentage error in kinetic energy will be m m 100+2 v v 100 array l =2+6 =8 % array

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