TUGASAN CUTI SEKOLAH FORM 4 2013

Tugasan cuti sekolah tingkatan 4 terdapat dlm ruangan MODUL FORM 4.



Sila cetak modul tersebut dan mulakan tugasan anda dan hantar seminggu selepas cuti sekolah..


Selamat Berhomework  kepada semua..

FORCES IN EQUILIBRIUM

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 



Understanding The Effect of Force

The Effect Of Force

 

Newton's Second Law of Motion

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Analysing Electromanetic Induction

 Analysing Electromanetic Induction

 

Electromagnetic induction is the production of a potential difference (voltage) across a conductor when it is exposed to a varying magnetic field.


Michael Faraday is generally credited with the discovery of induction in 1831 though it may have been anticipated by the work of Francesco Zantedeschi in 1829.^[1] Around 1830^[2] to 1832,^[3] Joseph Henry made a similar discovery, but did not publish his findings until later.



Faraday's law of induction is a basic law of electromagnetism that predicts how a magnetic field will interact with an electric circuit to produce an electromotive force (EMF). It is the fundamental operating principle of transformers, inductors, and many types of electrical motors, generators and solenoids.^[4][5]



The production of Induced EMF or induced current without  using power supply but using relative motion between permanent magnet and currnet carrying conductor



There are two types of relative motion

                                  1) moving conductor in a permanent magnet

 



 

 

 

 

 

 

 

 

 

 

The direction of the induced current can be determined by using FLEMING'S RIGHT HAND RULE

 







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2) Moving Magnet in a Solenoid

 

 

 

 

 

 

The direction of induced current can be determined using LENZ'S LAW

 

 





Inertia And Mass

Inertia and Mass

 

 

Newton's first law of motion states that "An object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force."

 Objects tend to "keep on doing what they're doing." In fact, it is the natural tendency of objects to resist changes in their state of motion. This tendency to resist changes in their state of motion is described as inertia.

Mass as a Measure of the Amount of Inertia

All objects resist changes in their state of motion. All objects have this tendency - they have inertia. But do some objects have more of a tendency to resist changes than others? Absolutely yes! The tendency of an object to resist changes in its state of motion varies with mass.

 Mass is that quantity that is solely dependent upon the inertia of an object. The more inertia that an object has, the more mass that it has. A more massive object has a greater tendency to resist changes in its state of motion.

See the Inertia demonstration here:

 

 

 

 

 

The Negative Effect of Inertia

 

Principle of Conservation of Momentum

 Principle of Conservation of Momentum



One of the most powerful laws in physics is the law of momentum conservation. The law of momentum conservation can be stated as follows.

For a collision occurring between object 1 and object 2 in an isolated system, the total momentum of the two objects before the collision is equal to the total momentum of the two objects after the collision. That is, the momentum lost by object 1 is equal to the momentum gained by object 2.
 

Elastic And Inelastic Collision 

 

Observed The Video Clip

ELASTIC COLLISION

 

So the formula for Elastic Collision is:

 

 



 



INELASTIC COLLISION

 

 

 

 

The formula for Inelastic Collision is:

 

 

 

 



 

Explosion

 

 

 

 

 

Momentum is a commonly used term in sports. A team that has the momentum is on the move and is going to take some effort to stop. A team that has a lot of momentum is really on the move and is going to be hard to stop.



Momentum is a physics term; it refers to the quantity of motion that an object has. A sports team that is on the move has the momentum. If an object is in motion (on the move) then it has momentum.

Momentum can be defined as "mass in motion." All objects have mass; so if an object is moving, then it has momentum - it has its mass in motion.
The amount of momentum that an object has is dependent upon two variables: how much stuff is moving and how fast the stuff is moving.

 Momentum depends upon the variables mass and velocity. In terms of an equation, the momentum of an object is equal to the mass of the object times the velocity of the object.

Momentum = mass • velocity

In physics, the symbol for the quantity momentum is the lower case "p". Thus, the above equation can be rewritten as

p = m • v

where m is the mass and v is the velocity.

The equation illustrates that momentum is directly proportional to an object's mass and directly proportional to the object's velocity.

 

Express your understanding of the concept and mathematics of momentum by answering the following questions. Click the button to view the answers.

1. Determine the momentum of a ...

a. 60-kg halfback moving eastward at 9 m/s. b. 1000-kg car moving northward at 20 m/s.
c. 40-kg freshman moving southward at 2 m/s.
 

Answer 

2. A car possesses 20 000 kg ms-1 of momentum. What would be the car's new momentum if ...

a. its velocity was doubled.b. its velocity was tripled.
c. its mass was doubled (by adding more passengers and a greater load)
d. both its velocity was doubled and its mass was doubled.

Answer