Physical Quantities and Units
Physics ⇒ Mechanics
Physical Quantities and Units starts at 6 and continues till grade 12.
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See sample questions for grade 10
Define a derived quantity and give one example.
Explain the difference between scalar and vector quantities with one example each.
Explain why units are important in physics.
State the SI unit of acceleration.
A block has a mass of 5 kg and a volume of 0.01 m3. What is its density in kg/m3?
A car travels 100 meters in 5 seconds. What is its average speed in m/s?
A force of 10 N is applied to move an object 2 m in the direction of the force. Calculate the work done.
A force of 50 N acts on a body and moves it 4 m in the direction of the force. Calculate the work done.
Which of the following is a correct combination of SI base units?
(1) Length - meter, Mass - kilogram, Time - second
(2) Length - liter, Mass - gram, Time - minute
(3) Length - centimeter, Mass - milligram, Time - hour
(4) Length - inch, Mass - pound, Time - second
Which of the following is a fundamental physical quantity?
(1) Force
(2) Length
(3) Speed
(4) Pressure
Which of the following is a scalar quantity?
(1) Velocity
(2) Displacement
(3) Force
(4) Speed
Which of the following is a vector quantity?
(1) Distance
(2) Speed
(3) Displacement
(4) Energy
Fill in the blank: The SI unit of frequency is ________.
Fill in the blank: The SI unit of length is ________.
Fill in the blank: The SI unit of pressure is ________.
The SI unit of mass is ________.
Is the second a base unit in the International System of Units (SI)?
Is volume a derived quantity?
State whether the following statement is true or false: Temperature is a fundamental physical quantity.
True or False: The ampere is the SI unit of electric current.
