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प्रश्न
Explain the following concept in your own words with everyday examples:
Acceleration
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उत्तर
The rate of change of velocity is known as acceleration. It is a vector quantity.
For example, if a car is moving on a straight with variable speed, it will possess some acceleration. In case the speed of the car remains the same but the direction of the car changes, then also the car would be accelerating.
संबंधित प्रश्न
Define the term acceleration due to gravity. State its average value.
A train moving with a velocity of 20 ms−1 is brought to rest by applying brakes in 5 s. Calculate the 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.
Give an example of an accelerated body, moving with a uniform speed.
A cyclist driving at 36 kmh−1 stops his motion in 2 s, by the application of brakes. Calculate
- retardation
- distance covered during the application of brakes.
Convert the following acceleration:
1/36 m/s2 into km/h2
A car starts from rest and it is travelling with a velocity of 20 m/s in 10 s. What is its acceleration?
The Unit of acceleration is ______.
An object can be moving with uniform speed but with variable acceleration.
When a body is said to be in
- uniform acceleration
- non–uniform acceleration?
