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Units and Measurement
Question
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Two particles A and B of mass 5m and 2m are separated by certain distance. Which of the two masses is nearer to centre of mass?

Answer

The mass which is heavier is closer to the centre of mass. That is, mass of 5m lies closer to the centre of mass. 

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Some More Questions From Units and Measurement Chapter

What is the need of measurement?

Define physical quantity.

 

Give four examples of physical quantities.

Define unit.

What are the two main required characteristics of a unit?

Can we use same units for different physical quantities?

Can we use different units to measure same physical quantity?

To measure a physical quantity X, the unit U is repeatedly used for n times. What is the magnitude of physical quantity?

Does the numerical factor in the quantitative measurement depend on the system of unit used?

Is one unit sufficient to measure a physical quantity?