S.I Units + Kinematics + Dynamics
Table of Content
Physical Quantities & Units................................................................................................................................... 1
Kinematics...................................................................................................................................................................... 2
Terminology + Key Information................................................................................................................... 2
Motions graphs...................................................................................................................................................... 3
Projectile Motion.................................................................................................................................................. 4
Dynamics......................................................................................................................................................................... 4
Terminology + Key Information................................................................................................................... 4
Skydiver - Example............................................................................................................................................. 7
Momentum............................................................................................................................................................... 7
Physical Quantities & Units
Fundamental Quantities S.I Base Units
Name Symbol Name Symbol
Mass m Kilograms kg
Length Lowercase L Metres m
Time t Seconds s
, Current I Amperes A
Temperature T Kelvin °K
Fahrenheit °F
Celsius °C
Amount of n mol per cubic mol/c m 3
Substance metres
Luminous Intensity lv candela cd
Kinematics
Terminology + Key Information
Displacement [vector quantity]: distance travelled from fixed/original position in a
specified direction
Velocity [vector quantity]: rate of change of displacement
Distance [scalar quantity]: total length covered by moving object regardless of
direction
Speed [scalar quantity]: rate of change of distance
Acceleration [vector quantity]: Rate of change in velocity
SUVAT equations - when acceleration is constant:
1st - No displacement [s]
v=u+at
→ Derived from acceleration equation
2nd - No acceleration [a]
1
s= (u+ v)t
2
→ Area of trapezium - from velocity-time graph [area beneath the graph]
Table of Content
Physical Quantities & Units................................................................................................................................... 1
Kinematics...................................................................................................................................................................... 2
Terminology + Key Information................................................................................................................... 2
Motions graphs...................................................................................................................................................... 3
Projectile Motion.................................................................................................................................................. 4
Dynamics......................................................................................................................................................................... 4
Terminology + Key Information................................................................................................................... 4
Skydiver - Example............................................................................................................................................. 7
Momentum............................................................................................................................................................... 7
Physical Quantities & Units
Fundamental Quantities S.I Base Units
Name Symbol Name Symbol
Mass m Kilograms kg
Length Lowercase L Metres m
Time t Seconds s
, Current I Amperes A
Temperature T Kelvin °K
Fahrenheit °F
Celsius °C
Amount of n mol per cubic mol/c m 3
Substance metres
Luminous Intensity lv candela cd
Kinematics
Terminology + Key Information
Displacement [vector quantity]: distance travelled from fixed/original position in a
specified direction
Velocity [vector quantity]: rate of change of displacement
Distance [scalar quantity]: total length covered by moving object regardless of
direction
Speed [scalar quantity]: rate of change of distance
Acceleration [vector quantity]: Rate of change in velocity
SUVAT equations - when acceleration is constant:
1st - No displacement [s]
v=u+at
→ Derived from acceleration equation
2nd - No acceleration [a]
1
s= (u+ v)t
2
→ Area of trapezium - from velocity-time graph [area beneath the graph]
