What is Speed, Velocity, Acceleration, and Retardation in Engineering Mechanics?
Speed
It is the rate of change of displacement with respect to its surrounding. Since the speed of a body is irrespective of its direction, therefore it is a scalar quantity.
Velocity
It is also the rate of change of displacement with respect to its surrounding, in a particular direction. Since the velocity is always expressed in a particular direction, therefore it is a vector quantity.
Acceleration
It is the rate of change of velocity of a body. It is said to be positive; when the velocity of a body increases with time and it is negative when the velocity decreases with time.
It is the rate of change of displacement with respect to its surrounding. Since the speed of a body is irrespective of its direction, therefore it is a scalar quantity.
Velocity
It is also the rate of change of displacement with respect to its surrounding, in a particular direction. Since the velocity is always expressed in a particular direction, therefore it is a vector quantity.
Acceleration
It is the rate of change of velocity of a body. It is said to be positive; when the velocity of a body increases with time and it is negative when the velocity decreases with time.
The negative acceleration is also called Retardation.
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speed is rate of change of distance with time
ReplyDeleteI think ¨the rate of change of distance ¨ and ¨ the rate of change of displacement ¨ all mean the same. Displacement = Distance (synonyms)
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