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Units And Measurement

Question

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How is torque related with angular momentum?

Solution

Torque is the rate of change of angular momentum.

i.e.,

straight tau with rightwards harpoon with barb upwards on top space equals space fraction numerator d L with rightwards harpoon with barb upwards on top over denominator d t end fraction

Some More Questions From Units and Measurement Chapter

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?

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