Wave Properties

In merupakan bab pertama dalam syllabus tingkatan 5. Murid 5 UM dan 5UKM anda diminta membuat kuiz yang disediakan. Sebarang pertanyaan boleh ditulis pada Cbox atau hantar ke Facebook saya.

1. Waves are produced by vibrating systems.

Vibrating systems

2. Waves transfer energy. Waves that travel through a medium transfer energy without transferring matter.


3. In transverse waves, the direction of waves propagation is perpendicular to the direction of vibration of the particles.
Example: water waves, light waves and electromagnetic waves.


4. In longitudinal waves, the direction of wave propagation is parallel to the direction of vibration of the particles.
Longitudinal waves need a medium to propagate. This type of waves cannot propagate through a vacuum.
Example: a sound wave.




5. A wavefront is an imaginary line representing all parts of a wave in which particles are vibrating in the same phase and have the same distance from the source.
The direction of propagation of waves is always perpendicular to the wavefront.


6. Amplitude, a, is the maximum displacement from the equilibrium position.

7. Period, T, is the time required to make one complete oscillation.

8. Frequency, f, is the number of complete oscillations made in one second.

9. Wavelength, is defined as the distance between two consecutive points that are in phase.

( i ) For a transverse wave, wavelength can be measured as the distance from one crest and also the distance from one trough to the next trough.
(ii ) For a longitudinal wave, wavelength can be measured as the distance between
two consecutive compressions or two consecutive rarefactions.

Password : fizik

Wave Properties » Fun Trivia Maker

Link Percubaan SPM Fizik 2010

Link of SPM physics trial papers.

1. SBP 2010 (P1, P2, P3 ) + (marking scheme )

2. Terengganu 2010 ( P1, P2 , P3 + marking scheme)

3 . Perlis 2010 (P1) , ( P2), (P3) + ( marking scheme)

4. Johor ( P1, P2 , P3 + marking scheme )

5. Selangor ( P1 ) + ( P2) +( P3) + ( marking scheme P1 + P2 + P3)

6. Pahang ( P1) + ( P2) +( P3) + ( marking scheme)

7. Melaka

8. MRSM

Reflection of light

Reflection occurs when a light ray bounces off a surface.

Terminology :

Incident ray is the incoming light ray.

Reflected ray is the light ray moving away from the surface .

The most important characteristic of these rays is their angles in relation to the reflecting surface. These angles are measured with respect to the normal of the surface.

The normal is an imaginary line perpendicular to the surface.

The angle of incidence, θi is measured between the incident ray and the normal.

The angle of reflection, θr is measured between the reflected ray and the normal.

When a ray of light is reflected, the reflected ray lies in the same plane as the incident ray and the normal.

Law of Reflection
The Law of Reflection states that the angles of incidence and reflection are always equal and
that the reflected ray always lies in the plane of incidence.

When you smile into a mirror, you see your own face smiling back at you. Did you notice that;
i. the size of the image is the same as you (object)
ii. the distance of the image seem as the same distance of you from the mirror.
iii. when you move your left hand, the image will move it right hand
iv. then you image never upside down .



worked example:
Question: An incident ray strikes a smooth reflective surface at an angle of 33◦ to the surface normal. Calculate the angle of reflection.

Answer
Step 1 : Determine what is given and what is required We are given the angle between the incident ray and the surface normal. This is the angle of incidence. We are required to calculate the angle of reflection.

Step 2 : Determine how to approach the problem We can use the Law of Reflection, which states that the angle of incidence is equal to the angle of reflection.

Step 3 : Calculate the angle of reflection We are given the angle of incidence to be 33◦. Therefore, the angle of reflection is also 33◦.

quiz :

Laws of reflection » Quiz Make

Physics Definition

Normally this is test in paper 2 and 3, remember to answer in full sentence DO NOT write equation !!!
example :
a. ) momentum is product of mass and velocity ( correct )
b. ) momentum = mass x velocity ( wrong)
SPM Physics Terms and Definition

How to answer SPM physics (paper 2 and 3)?

Semua maklumat yang diberi adalah dari JUJ Pahang 2009.

1. How to write experiment precaution ?

prec

2. Tips to answer paper 2

p2

3. Tips to answer paper 3

D Desktop g3

Tips for paper 2 ( SPM physics)

1. Definition of the term in Physics
Force, work, inertia, impulsive force, coherent...

2. The principle in Physics and applications
Force in equilibrium, thermal equilibrium, Pascal's principle, conservation of momentum.

3. The Law in Physics and application
Hooke's Law, Ohm's Law, Boyle's Law, Charles Law

4. Graph skills
Axis, plotting, scale, straight or curve line, gradient, extrapolation.

5. Drawing skills
Total internal reflection, lens ray, inteferens, field circuit, refraction of wave



Mini quizzes :
1. What is meant by frequency of oscillation on spring?
2. What is meant by pressure ?
3. Define speed.


4.

Last minutes SPM physcis check list

5UM and 5 UKM students pls download.
Fill in the blank i will discuss with you all after 2nd trial.
All the best ...good luck in your coming SPM

tip jawab

Acceleration and deceleration

Dear our form 4 students answer following question before star your lesson.

Pretest:

1. state the meaning and unit for the symbol
i) a
ii) v
iii) u
iv) t

2. Define acceleration and deceleration

Lesson start:

Acceleration is the rate of change of velocity. ( 1 mark in paper 2 )

An object accelerates when it moves with increasing velocity.

An object decelerates when is getting slower, its velocity is decreasing.

Equation :

where

a: acceleration ( ms-²)

u: initial velocity ( ms-¹)

v: final velocity ( ms-¹)

t: time ( second)

Calculation:

Tips:

First of all find out all useful info as highlighted. Then substitute the info given in equation, while you are calculating check whether need to change units or not. (e.g., from km to m, hour to seconds)

email your solution to fizikf5@gmail.com

1.An athletic runs from the starting line and achieves a velocity of 12 m/s in 3 s. Find his/her acceleration. (ans: 4 ms^-2)

2. A track travels along a road with a velocity of 20 m/s the driver slam on the brake when a chicken suddenly runs across the road. Assuming the truck take 8s to complete stop from the time the driver hit the brake, determine the acceleration of the lorry. (ans: -2.5 ms^-2)

3. A motorcycle move with a velocity of 25 m/s. the motorcyclist brakes and its velocity decreases uniformly to 10 m/s in 3s. The motorcycle continues to slow down with the same acceleration until it comes to a stop. Find the time taken for the motorcycle to stop. (ans: 5s)

* Step 1 : Determine its acceleration in the first 3s,

Step 2 : Determine the time taken .

For more detail study the graph below.

Speed and velocity

perhatian pelajar 4um dan 4ukm
sila jawab semua soalan dibawah dan hantar melalui e-mail kepada pn chow
sebelum 23 oktober 2009



1. Define distance and displacement
~ Distance between two points is the path traveled by the object.
~ Displacement is distance in a specified direction.

2. Define speed and velocity, and state that v= s/t
~ Speed is the rate of change of distance and can be expressed as:
~Speed = distance / time

~ Velocity is the rate of change of displacement and can be expressed as:
~ Velocity = displacement / time , or
~ v = s/t

3. calculate speed and velocity
a. Which of the following is not a scalar quantity?
Distance / Speed / Velocity

b. What is the speed of cheetah if it sprints 100 m in 4s?
( Tips: check units before do your calculation )

c. The diagrams below shows a ticket tapes .

Determine,
i) Time interval between each dot.
ii) Time taken from A t B.
iii) Distance covered from A to B.
iv) Velocity

NUclear Fusion

Nuclear fusion is the reaction nuclei of two light nuclides are fused together to form a single heavies nucleus with the release of energy.

learn more here:

http://www.visionlearning.com/library/flash_viewer.php?oid=2747


Advantages of using nuclear fusion as a power source are;
i) Hydrogen isotopes used as fuel are cheap and easily available.
ii) Products of nuclear fusion are not radioactive and do not cause pollution.

http://www.astro.ubc.ca/~scharein/a311/Sim/fusion/Fusion.html

two suitable conditions in the sun that allows nuclear fusion to take place are:
i) high temperature, and
ii) high particle density.