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CBSE Class 9 Answered

what is retarding? explain it briefly with a example ? 
Asked by sneha.saurav20 | 14 Jul, 2015, 07:40: PM
answered-by-expert Expert Answer
Retardation means negative acceleration. 
When the velocity of a body increases with time, it is called acceleration. However, if the velocity decreases, then it is called retardation, deceleration or negative acceleration.

 Retardation is also measured as change in velocity per time taken for change.

begin mathsize 12px style Retardation equals fraction numerator Change space in space velocity over denominator Time space taken space for space change end fraction end style
Example:
1. When we apply the brake of a car the velocity decreases.
2. When a person opens a parachute, its velocity goes on decreasing.
Answered by Faiza Lambe | 15 Jul, 2015, 09:20: AM

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