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प्रश्न
Correct your friend who says that acceleration gives the idea of how fast the position changes.
उत्तर
There are two possible answers:
Velocity gives an idea of how fast the position changes, or Acceleration gives an idea of how fast the velocity changes.
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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?
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Give an example of each type of motion.
A train starts from rest and accelerates uniformly at a rate of 2 m s-2 for 10 s. It then maintains a constant speed for 200 s. The brakes are then applied and the train is uniformly retarded and comes to rest in 50 s. Find
(i) The maximum velocity reached,
(ii) The retardation in the last 50 s,
(iii) The total distance travelled,
(iv) The average velocity of the train.
Give an example of an accelerated body, moving with a uniform speed.
A racing car is moving with a velocity of 50 m/s. On
applying brakes, it is uniformly retarded and comes to rest in 20 seconds. Calculate its acceleration.
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Diagram is given below shows velocity – time graph of car P and Q, starting from the same place and in the same direction. Calculate the Acceleration of car P.
A motor bike running at 5 ms−1, picks up a velocity of 30 ms−1 in 5s. Calculate
- acceleration
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- acceleration
- distance covered during slow down.
What does a positive acceleration mean?
Is it possible for an accelerating body to have constant speed?
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Reason: Acceleration can be produced only by change in magnitude of the velocity. It does not depend the direction.
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The Unit of acceleration is ______.
What is meant by negative acceleration?
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Reason: Motion may be straight-line motion or circular motion.
