Physics Note

PHYSICS Chapter Words Physical Quantities Base Quantities

A quantity that is measure

Derived Quantities

Physical quantities that can quantities Physical quantities derived

Scalar Quantities

Physical quantities that has

Vector Quantities

Physical quantities that has

Consistency (Precision)

The degree of uniformity o

Accuracy

The degree of how close a

Sensitivity

The ability to detect small

Deviation

The difference between th the average value Cumulative errors that can

Systematic Error Random Error Zero Error Parallax Error

Arises from unpredictable error every time the exper Arises when a not-in-used from zero An error which the observ to the scale

Absolute Error

Refer to the smallest readi instrument

1 Definition ble not be defined in term of other physical by combining base quantities only magnitude both magnitude and direction f the measurements easurement is from the actual value changes in measuring physical quantities e measured value and its mean value or be corrected, if the errors are known ariation that may produce a different iment is repeated easuring instrument does not start r's eyes are not in a line perpendicular

ng that can be measured by an

PHYSICS Chapter Words Linear Motion

Sta Motion in a straight line

Kinematics Dynamics

The study of the motion of acting on it The study of the motion of

Distance

The total length of the pat

Displacement

The distance travelled in a

Speed

The rate of change in dista

Velocity

The rate of change in displ

Acceleration

The rate of change in veloc

Deceleration

The rate of decrease in sp

Uniform Speed

Speed that remains the sa direction Velocity that remains the s

Uniform Velocity Non-uniform Velocity Zero Acceleration

(a)the direction of motion (b)the magnitude of its vel An object moving at a cons direction of its velocity re

Constant Acceleration

Velocity increases at a unif

Inertia

The tendency of an object

Momentum

The product of its mass an

Principle of conservation of momentum ( PCM ) Collision (Based on PCM) Explosion (Based on PCM) Elastic Collision

The total momentum of a s acts on the system The total momentum of the after the collision The sum of the momentum

Force

(a)Two objects collide and (b)Momentum is conserved (c)Total energy is conserve (d)Kinetic energy is conser (a)Two objects combine an after a collision (b)Momentum is conserved (c)Total energy is conserve (d)Kinetic energy is not con (e)The total kinetic energy kinetic energy before t (a)Momentum to the left = (b)Momentum upwards = M (c)Momentum forwards = M The resistant of change to

Balanced Force

When the force acting on a

Inelastic Collision

Concepts of momentum

Unbalanced Force / Resultant Force Impulse Impulsive Force

other out When the force acting on a a net force acting on it Change in momentum

Gravitational Force

(a)The rate of change of m (b)Longer period of time (c)Shorter period of time The pull of gravity or the e

Free Fall

The falling of an object wit

Acceleration due to gravity ( 10 m/s ) Gravitational Field

Objects dropped under the constant acceleration The region around the eart towards the centre of the The gravitational force whi

→

Gravitational Field Strength ( 10 N/kg ) Weight

The gravitational force act

Mass

The amount of matter in th

Force in Equilibrium

(a)When an object is in equ is zero (b)The object will either b at rest moving with constant vel → →

tement & Definition

an object without considering the force an object and the force acting on it h travelled specific direction nce cement ity ed in a specified direction e in magnitude regardless of its ame in magnitude and direction hanges or the motion is not linear city changes ant velocity, that is, the magnitude and ain unchanged

orm rate to resist change to its state of motion velocity stem is constant, if no external force objects before a collision equals that remains at zero after an explosion ove apart after a collision d ed stop, or move together with a common

d served after the collision is less than the total e collision Momentum to the right mentum downwards omentum backwards its state of motion or move in the object n object are balanced, they cancel each

n object are not balanced, there must be

mentum Impulsive force decreases Impulsive force increases arth's gravitational force h only force of gravity influence of the pull of gravity with h in which an object experiences a force arth ch acts on a mass of 1 kilogram ing on the object e object ilibrium, the resultant force acting on it

city