Chapter 1.3, Problem 20SSC

To determine

The explanation of the result of the report.

Explanation of Solution

Introduction:

The precision in the measurement of a physical quantity depends on the significant figures in the scale. More is the number of significant figures in the chosen scale; more precise is the result.

The average time taken by the car to cover the track is $65.414\text{s}$ . The average time measures up to the thousandth place of the second. The precision of the clock is $0.1\text{s}$ . The clock can measure the only tenth place of the second. The precision of the clock is a hundred times less than the average time of the car. The average time measures by the clock are hundred times less precise. The error occurs in each measurement, and the average time measure by the clock becomes inaccurate.

Conclusion:

The clock shows an inaccurate result. So, I have no confidence in the result of the report.