Physical Quantities

Which statement is correct about physical quantities?

• Quantities that can be combined.

• Quantities that can be described.

• Quantities that can be measured.

• Quantities that can be expressed.

In which way the physical quantities are expressed?

• magnitude only

• unit only

• numbers and unit

• magnitude and numbers

Which of the following is NOT the example of physical quantities?

• the mass of a stone

• the speed of a car

• the depth of the ocean

• the power of superhero

What is the average speed of an athlete sprinting?

• 1.0 m s^-1

• 10 m s^-1

• 50 m s^-1

• 100 m s^-1

What is the average atmospheric pressure within the Earth?

• 10 Pa

• 1.000 Pa

• 100.000 Pa

• 1.000.000 Pa

Which of the following quantities is NOT a fundamental quantity?

• the length of a running track

• the power generated by car engine

• the mass of a boy

• the temperature of the Sun

Which of the following is the example of base quantity?

• the height of a mountain

• the area of a soccer field

• the volume of a water tank

• the weight of an apple

Which of the following is the correct pair of derived quantity and its SI base units?

• temperature - Kelvin

• speed - m s^-1

• volume - Litre

• area - cm²

Force has a SI base units of kg m s^-2.

Area has a SI base units of m².

What is the SI base units of pressure?

(pressure = force / area)

• kg m^-2 s^-2

• kg m^-1 s^-2

• kg m² s^-2

• kg m³ s^-2

Mass has a SI unit of kg.

Gravitational acceleration has a SI base units of m s^-2.

Height has a SI unit of m.

What is the SI base units of gravitational potential energy?

(gravitational potential energy = mass x grav. acceleration x height)

• kg m^-2 s^-2

• kg m^-1 s^-2

• kg m² s^-2

• kg m³ s^-2