this chapter include the physical quantites and their measurement https://www.youtube.com/watch?v=nejarAzn76A https://www.slideshare.net/SeemaTarannum/force-and-pressure-236146569

1. PHYSICS
PHYSICAL QUANTITIES
AND
MEASUREMENT

2. CONCEPTS IN MODULE
 INTRODUCTION
 VOLUME AND ITS MEASUREMENT
 CAPACITY AND ITS MEASUREMENT
 AREA AND ITS MEASUREMENT
 DENSITY AND ITS MEASUREMENT
 CALCULATION OF SPEED
 NUMERICAL PROBLEMS
 RECAPTULATION
 EVALUATION

3. INTRODUCTION

6. MEASUREMENT OF VOLUME

11. VOLUME OF IRREGULAR
SHAPED SOLIDS

13. ACTIVITY-1
TO FIND THE VOLUME OF AN
IRREGULAR SHAPED SOLID
USING A MEASURING CYLINDER
(DISPLACEMENT METHOD)

16. NUMERICAL PROBLEMS

17. 1. Find the volume of a rubik’s cube of
length 4cm.
Solution:
Given a = 4 cm
volume of the cube = a× a × a
= (4x4x4) cm³
= 64 cm³
2. Find the volume of a spherical marble with
radius 2cm.
Solution:
Given r = 2 cm
volume of the sphere =V = 4/3πr3 = 4/3 x 3.14
x r x r x r
= 4/3 x 3.14 x 2 x 2 x 2 cm³
= 33.49 cm³

18. MEASUREMENT OF
CAPACITY

19. “
”
 https://www.youtube.com/watch?v=Tk
Xxn0bJ4r0
The maximum amount of matter a container can
hold is capacity
The units:
1. litre 2.mililitre 3.kiloliter
Measuring jar cylinder syringe
Name of the unit symbol Measures
kiloliter kl 1000 times of a litre
mililitre ml 1/1000

20. MEASUREMENT OF AREA

21.  Area is the measure of surface occupied by a body.

22. AREA OF AN IRREGULAR
SHAPE
ACTIVITY
(TO FIND THE SURFACE OF A LEAF)

23. “
”
The area of irregular shape cannot be determined easily just by using the formula for area of
the regular shaped object.

25. Area covered No. of squares Area (cm²)
Fully - filled
Half - filled
More than half-
filled
Total Area = _____________________cm²
Result: Area of the irregular shape = __________________ cm²

26. MEASUREMENT OF
DENSITY

28. FORMULA

29. UNIT OF DENSITY

30. ACTIVITY
TO UNDERSTAND THE MEANING OF DENSITY

33. DENSITY g/cm3
Aluminium 2.70
Brass 8.50
Iron 7.86
Wood 0.50
Slate 2.80
Glass 2.50
Lead 11.3
Marble 2.70
Wax 0.89

34. Conclusion
case1:
1.Substances of equal masses
need not be of equal volumes.
Case2:
2. substances of equal volumes
need not be of equal masses.

35. NUMERICAL PROBLEMS
(BASED ON DENSITY)

36. 1. Calculate the density of a
substance whose mass is 500g
and volume is 40cm³
 Solution:
Mass = 500g
Density = mass/volume
= 500/40
= 12.5 g/cm³
2. Calculate the mass of a
spherical object whose radius
is 3 cm. The density of the
object is 2g/cm³
 Solution:
Radius (r) = 3cm
Density =2g/cm³
First we need to find the volume
; V = 4/3πr3
Volume = 113.04 cm³
Mass = density x volume
= 2 x 113.04
= 226.08 g

37. CALCULATION OF SPEED

39. UNIT OF SPEED

43. NUMERICAL PROBLEM

44.  Units of time conversion chart are discussed here in hour, minute, second,
day, week, month, and year.
 The standard units of time are
1 hour = 60 minutes
1 minute = 60 seconds
1 hour = 60 minutes = 3600 seconds (60 × 60)
1 day = 24 hours
Units of Time Conversion Chart

45. RECAPTULATION

46. NUMERICAL PROBLEMS ON SPEED
 1. A man walks 20 km in 4
hours. Find his speed.
 Solution:
 Distance covered = 20 km
 Time taken = 4 hours
 We know, speed =
distance/time
 = 20/4 km/hr
 Therefore, speed = 5 km/hr
 2. A distance of 6 km is covered
by a two-wheeler in 8 minutes.
What would be the speed of the
car?
 Solution:
 Distance covered = 6 km
 Time taken = 8 min = 8/60 h
 We know, speed =
distance/time
 = 6/ 8x60 km/hr
 Therefore, speed = 45 km/hr

47. POINTS TO REMEMBER
VOLUME
Key Takeaways:
Volume is the three-dimensional
space occupied by a substance.
The International System of Units
(SI) standard unit of volume is the
cubic meter (m3).
The metric system uses the liter (L)
as a volume unit. One liter is the
same volume as a 10-centimeter
cube.
CAPACITY
Key Takeaways:
The maximum amount a container
can hold.
The unit of CAPACITY are litre (l) , ,
mililitre (ml) kiloliter (kl)
# 1000 mililitres = 1 litre.
# 1000 litres = 1 kiloliter
DENSITY
The mass per unit volume is call
density.
• Heating and cooling changes
the density of a substance.
• Substances with equal masses
need not be of equal volume.
• Substances with equal volume
need not of equal mass.
• Density = mass/volume
• SI unit of density is kg/m3

48. EVALUATION

49. OBJECTIVE TYPE QUESTIONS
STATE TRUE OR FALSE
Q1. Write true or false for each statement
(a) The S.I unit of volume is litre.
Answer: false
The S.I unit of volume is cubic metre.
(b) A measuring beaker of capacity 200ml can measure only the volume
200ml of a liquid.
Answer: True.
(c) cm2 is a smaller unit of area than m2.
Answer: True
(d) equal masses of two different substances have equal masses.
Answer: False
Equal volume of two different substances have different masses.

50. STATE TRUE OF FALSE
(e) The S.I unit of density is g/cm3
Answer: False
The S.I unit of Density is kg/m3
(f) 1 gm./ cm3 = 1000kg /m3
Answer : True
(g) The density of water is maximum at 4 degree C
Answer: True
(h)The speed of 5 m./s is less than 25km/h
Answer: True
(I) The S.I unit of speed is m/s
Answer: True

51. MATCH THE FOLLOWING
COLUMN A
A. Volume of a liquid
B. Area of a leaf
C. S.I unit of volume
D. S.I unit of Density
E. S.I unit of speed
COLUMN B
(i) kg/ m3
(ii) (j) m3
(iii) (k) graph paper
(iv) m/s
(v) Measuring cylinder

52. FILL IN THE BLANKS
1. The volume of an irregular solid is determined by the method of
____________________.
2. Volume of a cube = ________________
3. The area of an irregular lamina is measured by using a ________.
4. Mass = ______________
5. The S.I unit of density is ______________.
6. Distance travelled d = _______________.
------------------------------------------------------------------------
--
Answer : 1. displacement of liquid 2. a3 3. graph paper 4.density x
volume 5. kg/m3 6. speed x time