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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
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.
Explain the following concept in your own words with everyday examples:
Acceleration
Draw velocity – time graph for the following situation:
When a body is moving with variable velocity, but uniform retardation.
A motor bike running at 90 kmh−1 is slowed down to 18 kmh−1 in 2.5 s. Calculate
- acceleration
- distance covered during slow down.
The initial velocity of a car is 10 ms-1. It moves with an acceleration of 2 ms-2. What will be its speed after 10 seconds?
Convert the following acceleration:
1/36 m/s2 into km/h2
The slope of a velocity-time graph gives ______.
The acceleration of the body that moves with a uniform velocity will be ______.
A quantity has a value of 16ms-2. It is the ______.
A car is being driven at a speed of 20ms-1 when brakes are applied to bring it to rest in 5 s. The deceleration produced in this case will be ______.
