## Sunday, February 07, 2010

### [Physics Form 4] In Locomotion

Acceleration, velocity and displacement are the physical quantities often used to describe the motion of objects. These quantities are also known as the quantities of kinematics.

What are acceleration? Acceleration is a derived vector quantity that describes the motion of any object in terms of change in velocity per unit time. To be specific, it describes the increase in velocity of an object in one second.

Ex: The car is moving with a constant acceleration of 4ms-2. This means that the velocity of the car increases 4ms-1 every 1s. This occurs constantly throughout the motion of the car.

What is meant by velocity? Velocity is a derived vector quantity that describes the motion of any object in terms of change in displacement per unit time.

Constant velocity means the velocity is fixed throughout the motion. It also means the displacement covered by object is constant every one second.

The trolley above is moving down an inclined plane at the constant velocity of 1ms-1. This means that as the trolley is moving down the inclined plane, it covers a displacement of 1m every 1s. If the inclined plane is 3m long, it will take the trolley 3s to reach the bottom.

What is displacement? Displacement is a straight line distance measured from the initial point (reference point) to the final point.

Constant displacement is another way of saying that the object is stationary. When a displacement is constant, it means the final position is not changed. Hence, the object is resting at the final position.

Zero displacement is achieved when the final position meets the initial position. Hence, there is no distance between the final and initial positions.

1. Really wonderful explanation. I don't think anyone can explain better than this in very simple words.

Acai Berry

2. great post!thanks for sharing us

3. Thanks for the nice post. I am expecting some different idea from your side. You always represent some new thought in your post.
Acai Berry Diet
Acai Berry
Acai Max Cleanse
Diet Solution Program Review
How To Get Pregnant

4. nice article!

5. Nice post.Thanks!

6. There are some very great sources here and thank you for being so kind to post them here. So we can read them and give our opinion on subject.

7. Thanks for giving me an amazing post, its great time to read your post. I’ve got some more interesting topic for discussion.

## Nota Terkini

• - Sumber-sumber tenaga yang terdapat di dunia ini adalah boleh dikelaskan kepada dua kumpulan, iaitu: 1. Sumber tenaga yang boleh diperbaharui. 2. Sumb...
• - *Hukum-hukum Indeks – Hukum 1* *am x** an= am+n* dimana *a*, *m* dan *n* adalah nombor nyata. *Pembuktian Hukum 1* *Contoh 1* Cari nilai bagi yang ber...
• - Formula am sabun dapat diwakili dengan RCOONa untuk garam natrium atau RCOOK untuk garam kalium dengan R sebagai kumpulan alkil yang berantai panjang. Co...
• - *Kepupusan haiwan* (animal extinction) bermaksud *lenyapnya* atau *sudah tiada lagi* sesuatu haiwan itu di muka bumi ini. Kewujudan haiwan-haiwan tersebut...
• - Apabila suatu voltan, *V*, dikenakan merentasi katod dan anod suatu senapang elektron, tenaga elektrik yang dibekalkan kepada setiap elektron ialah *eV*, d...