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प्रश्न
Figure shows the velocity-time graphs for two cars A and B moving in the same direction. Which car has greater acceleration? Give reasons to your answer.
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उत्तर
Car B has greater acceleration because the slope of line B is more than the slope of line A.
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संबंधित प्रश्न
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.
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 truck running at 90 kmh−1, is brought to rest over a distance of 25 m. Calculate the retardation and time for which brakes are applied.
Define acceleration.
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The Deceleration.
The speed of a particle is constant. Will it have acceleration? Justify with an example.
It is possible to have objects moving with uniform speed but variable acceleration.
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Reason: Acceleration is a vector.
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Reason: Motion may be straight-line motion or circular motion.
