Physics And Measurement Question 293

Question: The values of kinetic energy K and potential energy U are measured as follows: $ K=100.0\pm 2.0J,U=200.0\pm 1.0J $ . Then the percentage error in the measurement of mechanical energy is -

Options:

A) 2.5%

B) 1%

C) 0.5%

D) 1.5%

Show Answer

Answer:

Correct Answer: B

Solution:

[b] $ M _{E}=K+U=300\pm 3J=E\pm \Delta E $

$ \frac{\Delta E}{E}\times 100=1% $



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