ভৌত রাশির মাত্রা ও বিভিন্ন ভৌত রাশির পরিমাপ পদ্ধতি (Part 2) | Physics | Class 9 | Chhaya

Watch is used for measurement of time. Stopwatch is used in swimming and running competitions.
Common balance is used for measurement of the mass of an object.
Sensitivity of a common balance is directly proportional to its capacity of measuring the slightest difference in the mass of an object.
In a weight box weights are in the ratio 5:2:2:1.

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