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% $
