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प्रश्न
Define acceleration.
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उत्तर
Acceleration of a body is rate of change of its velocity with respect to the time.
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संबंधित प्रश्न
State the type of motion represented by the following sketches in Figures.
Give an example of each type of motion.
Draw a graph for acceleration against time for a uniformly accelerated motion. How can it be used to find the change in speed in a certain interval of time?
Figure given below shows a velocity-time graph for a car starting from rest. The graph has three parts AB, BC and CD.
Which part of graph shows motion with uniform
(a) velocity (b) acceleration (c) retardation ?
From the velocity – time graph given below, calculate deceleration in region BC.
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.
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.
Write the SI unit of acceleration and retardation.
Correct your friend who says that acceleration gives the idea of how fast the position changes.
If a body starts from rest, what can be said about the acceleration of the body?
Assertion: A positive acceleration of a body can be associated with the slowing down of the body.
Reason: Acceleration is a vector.
