Page 13 - text book form physics kssm 2020

Bab 1
Chapter 1
Measurement
Pengukuran
Formula In terms of base quantities
Derived quantity S.I. unit
m m
Density ρ = kg m –3
V l × l × l
Figure 1.4 Example of describing a derived quantity

Activity 1.1 CPS ISS

Aim: To discuss derived quantities in terms of base quantities Download Table 1.3
and S.I. base units
Instructions:
1. Carry out a Think-Pair-Share activity.
2. Scan the QR code to download and print Table 1.3. http://bt.sasbadi.com/p4007
3. Discuss and complete the table.

Table 1.3
S.I. unit
Derived quantity In terms of base In terms of S.I.
Formula (Specifi c unit)
and its symbol quantities base units
if any
Area A A = l 2 –

Volume V V = l 3 –

m m m
Density ρ ρ = V l × l × l = l 3 –

l
Velocity v v = m s –1 –
t
v l l
Acceleration a a = = 2 –
t t × t t

Force F F = m × a kg m s –2 newton (N)

l ml
Momentum p p = m × v m × = –
t t
F
–1 –2
Pressure P P = kg m s pascal (Pa)
A
Energy or ml ml 2
W W = F × l 2 × l = joule (J)
Work t t 2

Charge Q Q = I × t A s coulomb (C)

1.1.3 7 7
1.1.3