AS - Topic 1 - Physical quantities and Units

Which of the following quantities are vectors?

• speed, velocity, acceleration
• velocity, acceleration, force
• force, acceleration, mass
• length, mass, time

Which of the following quantities is/are base quantities ? (Choose all correct answers)

• potential difference

• current

• energy

• power

• mass

Which of the following pairs of physical quantity and SI unit is correct ?

• Mass - SI unit : Gram
• Time - SI unit : Hour
• Electric current - SI unit : Volt
• Temperature - SI unit : Kelvin

Which of the following shows the prefixes in descending order correctly ?

• mega, giga, kilo, nano
• giga, kilo, mega, nano
• nano, kilo, mega, giga
• giga, mega, kilo, nano

What is derived quantities ?

• a tendency to do nothing or to remain unchanged.
• combination of two or more base quantities
• the quantity of motion of a moving body, measured as a product of its mass and velocity.

Which quantity is not a scalar quantity?

• the diameter of the Earth

• mass of a football

• your weight

• the temperature of an iron bar

Which of the following is a vector quantity?

• 5000 kg

• 10 ms^-1

• 120 km/h due north

• 45 hours

A ______ is a quantity that has magnitude but no direction.

What is definition of base quantities

• physical quantity derived from base quantities through multiplication or division or both

• physical quantity that not be defined in terms of other physical quantities

• physical quantity that cannot be defined in terms of other physical quantities

• physical quantity derived from base quantities through addition or subtraction or both

Define vector quantity.

• Quantity which has magnitude.

• Quantity which has both magnitude and direction

• Quantities that cannot be defined in term of other physical quantities

• Quantities derived from combination of base quantities through multiplication or division or both