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प्रश्न
What happens to the stepwise increasing speed-time graph when the size of each step is made very small?
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उत्तर
The graph becomes straight line with positive slope with time axis and represents almost a constant acceleration.
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संबंधित प्रश्न
Define acceleration. State its unit.
A car travels with uniform velocity of 25 m s-1 for 5 s. The brakes are then applied and the car is uniformly retarded and comes to rest in further 10 s. Find:
- The distance which the car travels before the brakes are applied,
- Retardation and
- The distance travelled by car after applying the brakes.
From the diagram given below, calculate acceleration.
A motor bike running at 5 ms−1, picks up a velocity of 30 ms−1 in 5s. Calculate
- acceleration
- distance covered during acceleration.
What do you understand about negative acceleration?
If a moving body comes to rest, then its acceleration is ______.
The value of acceleration for a body at rest is ______.
Assertion: A negative acceleration of a body can be associated with speeding up of the body.
Reason: Increase in the speed of a moving body is independent of its direction of motion.
Assertion: Position-time graph of a stationary object is a straight line parallel to the time axis.
Reason: For a stationary object, the position does not change with time.
What is the difference between uniform acceleration and non–uniform acceleration?
