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Units And Measurement

Question

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Two particles P and Q are revolving in circular path of radii r and 2r with same angular velocity. Which of the two travels faster?

Solution

F = m $straight v squared over straight r$
Velocity of the body is directly proportional to the radius.
Therefore, the particle Q with radius 2r will travel faster.

Some More Questions From Units and Measurement Chapter

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?

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?

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