3N3
is unpredictable
US. TALK.
BYEBYE.
Cheera Hazhmirra
Jermaine
Jingsheng
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Teacher-in-charge: Mr chio Students: Adlin, Diyanah, Elisa, Grace, Jermaine, Jingsheng, Pauline, Qianwei, Saiful, Tabatha, Vinis, Wende, Zongxian, Thursday, July 22, 2010
1:11 PM
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In physics, velocity is the rate of change of position. It is a vector physical quantity; both magnitude and direction are required to define it. The scalar absolute value (magnitude) of velocity is speed, a quantity that is measured in meters per second (m/s or ms−1) when using the SI (metric) system. For example, "5 meters per second" is a scalar and not a vector, whereas "5 meters per second east" is a vector. The average velocity v of an object moving through a displacement during a time interval (Δt) is described by the formula: The rate of change of velocity is acceleration – how an object's speed or direction changes over time, and how it is changing at a particular point in time. http://en.wikipedia.org/wiki/Velocity SHERLYN. |