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Units and Measurement
Question
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Two bodies of masses m1 and m2 are moving such that their momcntums are equal and opposite. What is the velocity of centre of mass of system of two bodies?

Answer

The centre of mass of the two systems will move with constant velocities. Here in this case, the velocity is zero because the momentum of the masses are equal and opposite. 

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Some More Questions From Units and Measurement Chapter

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

Is one unit sufficient to measure a physical quantity?

Can a physical quantity have two or more units? Give example.

What are fundamental quantities?

How many fundamental quantities are there in mechanics?

How many fundamental quantities are there in Physics?

Name the fundamental quantities of mechanics.

Name the different system of units in mechanics that are internationally accepted.

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