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Units And Measurement

Question

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Write the expression for torque in vector form.

Solution

Expression of torque is given by,
$straight tau with rightwards harpoon with barb upwards on top space equals space r with rightwards harpoon with barb upwards space on top cross times space F with rightwards harpoon with barb upwards on top space$

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?

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