Define uniform acceleration. Give an example of retardation or negative acceleration.
Answers
Explanation:
Retardation (or deceleration) of a body whose velocity is decreasing with time is defined as the negative of acceleration. ... Example: When a body is thrown vertically upwards, during the upward motion, its velocity decreases and at the highest point it becomes zero. This is a case of retardation.
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UNIFORM acceleration:
If an object's speed (velocity) is increasing at a constant rate then we say it has uniform acceleration. The rate of acceleration is constant. If a car speeds up then slows down then speeds up it doesn't have uniform acceleration.
example of retardation:
Velocity of vehicle decreases when brake is applied.
Landing of Aeroplane.
When fan is switched off.
A train reaching at a station.
negative acceleration:
When we throw a ball upwards, then also negative acceleration acts on it. Thus, when the ball reaches the highest point, the velocity of the ball becomes zero.