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प्रश्न
The rate of change of velocity is ______.
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उत्तर
The rate of change of velocity is acceleration.
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संबंधित प्रश्न
What is meant by the term retardation? Name its S.I. unit.
A body is moving vertically upwards. Its velocity changes at a constant rate from 50 m s−1 to 20 m s−1 in 3 s. What is its acceleration?
State the type of motion represented by the following sketches in Figures.
Give an example of each type of motion.
Figure given below shows a velocity-time graph for a car starting from rest. The graph has three parts AB, BC and CD.
(a) Is the magnitude of acceleration higher or lower than that of retardation ? Give a reason .
(b) Compare the magnitude of acceleration and retardation .
Explain the following concept in your own words with everyday examples:
Acceleration
An aeroplane lands at 216 kmh−1 and stops after covering a runway of 2 m. Calculate the acceleration and the time, in which it comes to rest.
What is the SI unit of acceleration?
The acceleration of a body is 8.5 ms-2. What does this statement mean?
State if the following situation is possible:
A body moving horizontally with an acceleration in vertical direction.
What happens to the stepwise increasing speed-time graph when the size of each step is made very small?
Sketch the shape of the velocity-time graph for a body moving with:
Uniform acceleration.
What do you mean by constant acceleration?
A car starts from rest and it is travelling with a velocity of 20 m/s in 10 s. What is its acceleration?
Negative acceleration is called ______.
What do you understand about negative acceleration?
Exercise Problem.
A racing car has a uniform acceleration of 4 ms–2. What distance it covers in 10 s after the start?
If the velocity of a body does not change, then its acceleration is ______.
If a body starts from rest, what can be said about the acceleration of the body?
When a body is said to be in
- uniform acceleration
- non–uniform acceleration?
