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प्रश्न
From the given v-t graph it can be inferred that an object is
पर्याय
in uniform motion
at rest
in non - uniform motion
moving with uniform accelerations
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उत्तर
moving with uniform accelerations
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संबंधित प्रश्न
Distinguish between acceleration and retardation.
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
- The maximum velocity reached,
- The retardation in the last 50 s,
- The total distance travelled,
- The average velocity of the train.
Explain the following concept in your own words with everyday examples:
Acceleration
Give an example of an accelerated body, moving with a uniform speed.
The change in velocity of a motorbike is 54 kmh−1 in one minute. Calculate its acceleration in (a) ms−2 (b) kmh−2.
From the velocity – time graph given below, calculate deceleration in region BC.
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 Q between 2 s – 5 s.
A cyclist driving at 5 ms−1, picks a velocity of 10 ms−1, over a distance of 50 m. Calculate
- acceleration
- time in which the cyclist picks up above velocity.
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.
A body falls towards the earth. Does it have positive or negative acceleration?
Write the SI unit of acceleration and retardation.
The speed of a car increases from 10 km/h to 64 km/h in 10 seconds. What will be its acceleration?
Convert the following acceleration:
7200 km/h2 into m/s2
The rate of change of velocity is ______.
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.
What do you understand about negative acceleration?
Acceleration is defined as the rate of change of ______.
Assertion: A positive acceleration of a body can be associated with the slowing down of the body.
Reason: Acceleration is a vector.
