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प्रश्न
What is meant by the term retardation? Name its S.I. unit.
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उत्तर
Retardation is the decrease in velocity per second.
Its SI unit is metre/second2 (m/s2).
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संबंधित प्रश्न
Explain the following concept in your own words with everyday examples:
Acceleration
The change in velocity of a motorbike is 54 kmh−1 in one minute. Calculate its acceleration in (a) ms−2 (b) kmh−2.
A racing car, initially at rest, picks up a velocity of 180 kmh−1 in 4.5 s. Calculate
- acceleration
- distance covered by the car.
Out of energy and acceleration, which one is a vector?
Correct your friend who says that acceleration gives the idea of how fast the position changes.
State whether true or false. If false, correct the statement.
Acceleration can get negative value also.
m/s2 is the unit of ______.
A bus accelerating with 4ms-2 changes its speed from 60ms_1 to a certain value in 5s. The final speed is ______.
Acceleration is defined as the rate of change of ______.
Assertion: Position-time graph of a stationary object is a straight line parallel to the time axis.
Reason: For a stationary object, the position does not change with time.
