Drag force data of a body moving in a fluid

Classical Mechanics Level 2

In an experiment to measure the drag force F D F_D of a body moving in a fluid, suppose the true value of F D F_D is 1.00 N. A student obtained the following 5 values in Newtons: 0.87, 1.03, 1.22, 0.94, 1.01.

Which of the following statements best describes his set of data?

His data is precise but not accurate. Systematic errors exist in his experiment. His data is accurate but not precise. Systematic errors exist in his experiment. His data is accurate but not precise. Random errors exist in his experiment. His data is precise but not accurate. Random errors exist in his experiment.

Wee Xian Bin by Wee Xian Bin , 25, Singapore

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1 solution

Wee Xian Bin
Jul 2, 2016

The average reading of F D F_D is 1.014 which is close to 1.00. However the readings vary widely, so his data is not precise and random errors (not systematic errors) exist.

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