Which of the units of the following physical quantities are derived? I. Area II. Thrust III. Pressure IV. Mass
Question 1 Report
Which of the units of the following physical quantities are derived? I. Area II. Thrust III. Pressure IV. Mass
Answer Details
The units of physical quantities that are derived are those that are not fundamental and can be expressed in terms of the fundamental units.
I. Area is derived from the fundamental unit of length, and the unit of area is expressed as square units of length, such as square meters or square centimeters.
II. Thrust is derived from the fundamental units of mass, length, and time, and its unit is expressed as newtons, which is equivalent to kg•m/s^2.
III. Pressure is derived from the fundamental units of force and area, and its unit is expressed as newtons per square meter, or pascals.
IV. Mass is a fundamental quantity, and its unit is expressed as kilograms.
Therefore, the units of physical quantities that are derived are I, II, and III only, and the correct answer is (b) I, II, III only.
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