Friday, June 22, 2012

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Acceleration

Acceleration
The rate of change per unit time is called acceleration.It is a vector quantity and it is denoted by "a".In SI System unit of a acceleration is m/s2.

Initial Velocity= u
Final velocity  = v
Time taken      = t
Acceleration    = Final velocity - initial velocity
Time taken
= v-u
t
Note*

If a body starts from rest to motion u= 0
If a body suddenly stops due to the application                               of external force, like- by applying brakes, v=0
# If a body is thrown vertically upward, at maximum height, v = 0