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प्रश्न
What do you understand about negative acceleration?
उत्तर
If v < u, i.e. if final velocity is less than initial velocity, the velocity decreases with time and the value of acceleration is negative. It is called negative acceleration. It is also called as retardation (or) deceleration.
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संबंधित प्रश्न
Explain the following concept in your own words with everyday examples:
Acceleration
From the diagram given below, calculate acceleration.
A motor bike running at 90 kmh−1 is slowed down to 18 kmh−1 in 2.5 s. Calculate
- acceleration
- distance covered during slow down.
The acceleration of a moving body is constant in magnitude and direction. Must the path of the body be a straight line?
If not, given an example.
The acceleration of a body is 8.5 ms-2. What does this statement mean?
Write the SI unit of retardation.
Is it possible for an accelerating body to have constant speed?
Exercise Problem.
A racing car has a uniform acceleration of 4 ms–2. What distance it covers in 10 s after the start?
What is meant by negative acceleration?
