Chapter 1: (C1& C2) Physical Quantities and Measurement

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

Choose TWO(2) examples of base quantity

• Mass and density

• Length and area

• Length and mass

• Mass and velocity

Define physical quantity

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

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

• Quantity that cannot be measured

• Quantity that can be measured

Determine the reading of the following measurement tools.

• 2.72 cm

• 2.78 cm

• 2.82 cm

• 2.88 cm

Convert 75𝜇𝑔 𝑡𝑜 𝑔

• 75000000 g

• 0.0075 g

• 0.000075 g

• 75000 g

The dimensional formula for kinetic energy is:

• M² L² T²

• M L² T^-2

• M² L T^-2

• M L² T

Resolve the vector to its horizontal component

A boy throws a stone at a velocity of 20 m s^-1, 50° above horizontal.

• 
• 
• 
• 

Basic quantity is defined as a

• quantity which can be derived from any physical quantities.

• quantity which cannot be derived from any vector quantities.

• quantity which cannot be derived from any physical quantities.

• quantity which can be derived from any vector quantities.