1. When measuring the mass of a steel ball, the student places the ball on a bal

Question

1. When measuring the mass of a steel ball, the student places the ball on a balance. The balance has not been calibrated, and therefore reads the value of the mass as 4.35 grams. The mass should have been recorded as 4.50 grams. Is this a systematic or human error? Find the percent error in the measurement.

2.When measuring the mass of a steel ball, the student places the ball on a balance. The student incorrectly reads the display as 4.58 grams. The mass should have been recorded as 4.50 grams. Is this a systematic or human error? Find the percent error in the measurement.

3. Newton

Explanation / Answer

Answer - Systematic error

Systematic errors are biases in measurement which lead to the situation where the mean of many separate measurements differs significantly from the actual value of the measured attribute. All measurements are prone to systematic errors, often of several different types. Sources of systematic error may be imperfect calibration of measurement instruments (zero error), changes in the environment which interfere with the measurement process and sometimes imperfect methods of observation can be either zero error or percentage error.

error = 4.5 - 4.35 = 0.15

percent error = (0.15 / 4.5) * 100 = 3.33 %

2- Human error

percent = (0.08/4.5) * 100 = 1.78%

3- As mass is directly proportional to Force, force will be measured more than actual value.

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