Q.

Percentage errors in the measurement of mass and speed are 2% and 3% respectively. The error in the estimate of Kinetic Energy obtained by measuring mass and speed will be

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a

8%

b

2%

c

12%

d

10%

answer is A.

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Detailed Solution

Percentage error in mass = 2% = 2100and percentage error in speed = 3 % =3100K.E.=12mv2thus percentage error in KE = 2+ 3×2=8
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Percentage errors in the measurement of mass and speed are 2% and 3% respectively. The error in the estimate of Kinetic Energy obtained by measuring mass and speed will be