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प्रश्न
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?
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उत्तर
The area enclosed between the straight line and time axis for each interval of time gives the value of change in speed in that interval of time.
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संबंधित प्रश्न
Define acceleration. State its unit.
What is meant by the term retardation? Name its S.I. unit.
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.
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.
A motorbike, initially at rest, picks up a velocity of 72 kmh−1 over a distance of 40 m. Calculate
- acceleration
- time in which it picks up above velocity.
State if the following situation is possible:
A body moving horizontally with an acceleration in vertical direction.
The Unit of acceleration is ______.
What is meant by negative acceleration?
Acceleration is a scalar.
It is possible to have objects moving with uniform speed but variable acceleration.
