, >
Weight-massxg 19 8
.
Physical Quantities (Estimates SI Units Multiples x Sub- multiples
Power of Mass (m) Kilogram (kg) Tera (T) 102 Milli (m) 103
light bulb 60W
·
= · =
·
a =
=
·
Speed of sound in air = 330 ms
Length (1) =
meter (m) Cuiga (G)
·
= 109 ·
Micro (m) = 10-6
Nano (n) 10-9
Atmospheric Pressure 1 0 10 Pa Time (t) second(s) Mega (M) 100
· · ·
= .
x = = =
·
Young modulus = x x 10" Temperature (T) = Kelvin (k) ·
Kilo (k) =
183 ·
Pico (p) = 10-1
Electric Current (1) =
ampere
(A)
Errors Uncertainties a
for 5 0 10 2 mm Scalars a Vectors
quantity x . .
=
only magnitude (speed distance
lucertain
Scalars has
·Absolute
work
energy, power
·
:
, , ,
mass ,
0 2 .
0 04.
·
Vectors has both
:
magnitude a direction (displacement ,
acceleration ,
force velocity, weight
,
·
Percentage Uncertainty = 100 = 100:4
When values are added or subtracted add the absolute error.
displacement
,
When values are divided or multiplied, add the percentage errors .
Average Velocity:
When values are raised to a
power ,
multiply percentage error
by the power .
Kinematics
Distance total path travelled
·
:
irrespective of direction . ·
AV=
final velocity-initial velocity
Displacement the shortest distance between the start and end point constant
velocity-speed direction stays the
·
: ·
a same
·
Speed :
of time
distance travelled
per
unit .
·
suvat
only used for objects travelling in constant direction a .
·
Velocity the rate of change of displacement (direction)
:
·
Gravitational acceleration on earth = 9 81ms
.
Acceleration the rate of
change of velocity (direction
·
:
Equations of Motion A
Eat/s vt-Eats (m) e
constant
velocity
s ut
displacement deceleration
Sale !
·
= + = =
·
v = u + at
h =
Egt
?
u =
velocity
initial (m s 1).
j ! D stops
t
(m s ) (m s -1)
12
backwards
final velocity
A 8 10
L acceleration
v Las constant
.
n v
.
· =
= +
E
·
s =
(u)t a = acceleration (m S-3)
.
t =
time (s) V
Displacement time graph s
linear motion
N V
2.5
accelerating
!
S S S S
(m . -c)
ac eleration acting backward
constant/ no
O 2
t t
Speed
t
Constant
Journey
Return Acceleration
Stationary
25
- .
Gradients
velocity v
V
Velocity time
graphs non-linear motion N
40 --------
>
- distance (x displacement)graph
-----
.
g
35 ---
----
!
V W ~ V -------
-
+ t t
Acceleration Deceleration Constant Speed
Stationary
Area under
graph change in displacement
=
Gradient-acceleration
V
Weight-massxg 19 8
.
Physical Quantities (Estimates SI Units Multiples x Sub- multiples
Power of Mass (m) Kilogram (kg) Tera (T) 102 Milli (m) 103
light bulb 60W
·
= · =
·
a =
=
·
Speed of sound in air = 330 ms
Length (1) =
meter (m) Cuiga (G)
·
= 109 ·
Micro (m) = 10-6
Nano (n) 10-9
Atmospheric Pressure 1 0 10 Pa Time (t) second(s) Mega (M) 100
· · ·
= .
x = = =
·
Young modulus = x x 10" Temperature (T) = Kelvin (k) ·
Kilo (k) =
183 ·
Pico (p) = 10-1
Electric Current (1) =
ampere
(A)
Errors Uncertainties a
for 5 0 10 2 mm Scalars a Vectors
quantity x . .
=
only magnitude (speed distance
lucertain
Scalars has
·Absolute
work
energy, power
·
:
, , ,
mass ,
0 2 .
0 04.
·
Vectors has both
:
magnitude a direction (displacement ,
acceleration ,
force velocity, weight
,
·
Percentage Uncertainty = 100 = 100:4
When values are added or subtracted add the absolute error.
displacement
,
When values are divided or multiplied, add the percentage errors .
Average Velocity:
When values are raised to a
power ,
multiply percentage error
by the power .
Kinematics
Distance total path travelled
·
:
irrespective of direction . ·
AV=
final velocity-initial velocity
Displacement the shortest distance between the start and end point constant
velocity-speed direction stays the
·
: ·
a same
·
Speed :
of time
distance travelled
per
unit .
·
suvat
only used for objects travelling in constant direction a .
·
Velocity the rate of change of displacement (direction)
:
·
Gravitational acceleration on earth = 9 81ms
.
Acceleration the rate of
change of velocity (direction
·
:
Equations of Motion A
Eat/s vt-Eats (m) e
constant
velocity
s ut
displacement deceleration
Sale !
·
= + = =
·
v = u + at
h =
Egt
?
u =
velocity
initial (m s 1).
j ! D stops
t
(m s ) (m s -1)
12
backwards
final velocity
A 8 10
L acceleration
v Las constant
.
n v
.
· =
= +
E
·
s =
(u)t a = acceleration (m S-3)
.
t =
time (s) V
Displacement time graph s
linear motion
N V
2.5
accelerating
!
S S S S
(m . -c)
ac eleration acting backward
constant/ no
O 2
t t
Speed
t
Constant
Journey
Return Acceleration
Stationary
25
- .
Gradients
velocity v
V
Velocity time
graphs non-linear motion N
40 --------
>
- distance (x displacement)graph
-----
.
g
35 ---
----
!
V W ~ V -------
-
+ t t
Acceleration Deceleration Constant Speed
Stationary
Area under
graph change in displacement
=
Gradient-acceleration
V
