1.1 Physical Quantities and Measurement
Initial measurement on ruler= 0cm
End reading on ruler= 5.5cm
Length of rod = Final reading – initial reading= 5.5-0 =5.5cm
Example: Four identical coins are placed on the ruler as shown in the figure. Determine the length of these coins.
Solution:
Initial measurement on ruler = 3cm
End reading on ruler = 15cm
Total length of five ball-bearings= 15-3 =12cm
❓ Exam Question
0625/0972/22-Feb-Mar-2020-Q1
Q#:21 The diagram shows a rectangular metal sheet close to two rulers.
What is the area of the metal sheet?
Solution:
Initial measurement on ruler= 0cm
End reading on ruler= 5.5cm
Length of rod = Final reading – initial reading= 5.5-0 =5.5cm
Example: Four identical coins are placed on the ruler as shown in the figure. Determine the length of these coins.
Solution:
Initial measurement on ruler = 3cm
End reading on ruler = 15cm
Total length of five ball-bearings= 15-3 =12cm
❓ Exam Question
0625/0972/22-Feb-Mar-2020-Q1
Q#:21 The diagram shows a rectangular metal sheet close to two rulers.
What is the area of the metal sheet?
Solution:
Initial measurement on ruler= 0cm
End reading on ruler= 5.5cm
Length of rod = Final reading – initial reading= 5.5-0 =5.5cm
Example: Four identical coins are placed on the ruler as shown in the figure. Determine the length of these coins.
Solution:
Initial measurement on ruler = 3cm
End reading on ruler = 15cm
Total length of five ball-bearings= 15-3 =12cm
❓ Exam Question
0625/0972/22-Feb-Mar-2020-Q1
Q#:21 The diagram shows a rectangular metal sheet close to two rulers.
What is the area of the metal sheet?
1.1.1 Measurement
What are Physical Quantities?
- All measurable quantities are known as physical quantities.
- Examples of physical quantities include length, mass, time, and temperature.
- Physical quantities have both magnitude and unit.
- For instance, consider a person holding a bag of groceries with a mass of 5 kg.
- In this example, 5 represents the magnitude of the mass, and kg represents the unit.
- Therefore, mass is an example of a physical quantity.
Measurement of length
- Length is a measurable physical quantity.
- A ruler is commonly used for measurements.
- Rulers cover lengths from millimeters to meters.
- Procedure:
- Place the rod alongside the ruler.
- Align one end of the rod with the ruler’s zero mark.
- Determine the length by reading the position of the other end on the ruler’s scale.
Example: Determine the length of rod placed on ruler as shown in figure.
Solution:
Initial measurement on ruler= 0cm
End reading on ruler= 5.5cm
Length of rod = Final reading – initial reading= 5.5-0 =5.5cm
Example: Four identical coins are placed on the ruler as shown in the figure. Determine the length of these coins.
Solution:
Initial measurement on ruler = 3cm
End reading on ruler = 15cm
Total length of five ball-bearings= 15-3 =12cm
❓ Exam Question
0625/0972/22-Feb-Mar-2020-Q1
Q#:21 The diagram shows a rectangular metal sheet close to two rulers.
What is the area of the metal sheet?
Solution:
Initial measurement on ruler= 0cm
End reading on ruler= 5.5cm
Length of rod = Final reading – initial reading= 5.5-0 =5.5cm
Example: Four identical coins are placed on the ruler as shown in the figure. Determine the length of these coins.
Solution:
Initial measurement on ruler = 3cm
End reading on ruler = 15cm
Total length of five ball-bearings= 15-3 =12cm
❓ Exam Question
0625/0972/22-Feb-Mar-2020-Q1
Q#:21 The diagram shows a rectangular metal sheet close to two rulers.
What is the area of the metal sheet?
1.1.1 Measurement
What are Physical Quantities?
- All measurable quantities are known as physical quantities.
- Examples of physical quantities include length, mass, time, and temperature.
- Physical quantities have both magnitude and unit.
- For instance, consider a person holding a bag of groceries with a mass of 5 kg.
- In this example, 5 represents the magnitude of the mass, and kg represents the unit.
- Therefore, mass is an example of a physical quantity.
Measurement of length
- Length is a measurable physical quantity.
- A ruler is commonly used for measurements.
- Rulers cover lengths from millimeters to meters.
- Procedure:
- Place the rod alongside the ruler.
- Align one end of the rod with the ruler’s zero mark.
- Determine the length by reading the position of the other end on the ruler’s scale.
Example: Determine the length of rod placed on ruler as shown in figure.
Solution:
Initial measurement on ruler= 0cm
End reading on ruler= 5.5cm
Length of rod = Final reading – initial reading= 5.5-0 =5.5cm
Example: Four identical coins are placed on the ruler as shown in the figure. Determine the length of these coins.
Solution:
Initial measurement on ruler = 3cm
End reading on ruler = 15cm
Total length of five ball-bearings= 15-3 =12cm
❓ Exam Question
0625/0972/22-Feb-Mar-2020-Q1
Q#:21 The diagram shows a rectangular metal sheet close to two rulers.
What is the area of the metal sheet?
Solution:
Initial measurement on ruler= 0cm
End reading on ruler= 5.5cm
Length of rod = Final reading – initial reading= 5.5-0 =5.5cm
Example: Four identical coins are placed on the ruler as shown in the figure. Determine the length of these coins.
Solution:
Initial measurement on ruler = 3cm
End reading on ruler = 15cm
Total length of five ball-bearings= 15-3 =12cm
❓ Exam Question
0625/0972/22-Feb-Mar-2020-Q1
Q#:21 The diagram shows a rectangular metal sheet close to two rulers.
What is the area of the metal sheet?
1.1.1 Measurement
What are Physical Quantities?
- All measurable quantities are known as physical quantities.
- Examples of physical quantities include length, mass, time, and temperature.
- Physical quantities have both magnitude and unit.
- For instance, consider a person holding a bag of groceries with a mass of 5 kg.
- In this example, 5 represents the magnitude of the mass, and kg represents the unit.
- Therefore, mass is an example of a physical quantity.
Measurement of length
- Length is a measurable physical quantity.
- A ruler is commonly used for measurements.
- Rulers cover lengths from millimeters to meters.
- Procedure:
- Place the rod alongside the ruler.
- Align one end of the rod with the ruler’s zero mark.
- Determine the length by reading the position of the other end on the ruler’s scale.
Example: Determine the length of rod placed on ruler as shown in figure.
Solution:
Initial measurement on ruler= 0cm
End reading on ruler= 5.5cm
Length of rod = Final reading – initial reading= 5.5-0 =5.5cm
Example: Four identical coins are placed on the ruler as shown in the figure. Determine the length of these coins.
Solution:
Initial measurement on ruler = 3cm
End reading on ruler = 15cm
Total length of five ball-bearings= 15-3 =12cm
❓ Exam Question
0625/0972/22-Feb-Mar-2020-Q1
Q#:21 The diagram shows a rectangular metal sheet close to two rulers.
What is the area of the metal sheet?