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प्रश्न
Draw velocity – time graph for the following situation:
When a body is moving with variable velocity, but uniform retardation.
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उत्तर
Following is the velocity-time graph:
When a body is moving with variable velocity, but uniform retardation
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संबंधित प्रश्न
Distinguish between acceleration and retardation.
What is meant by the term retardation? Name its S.I. unit.
The unit of retardation is ____________
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 space craft flying in a straight course with velocity of 75 km s-1 fires its rocket motors for 6.0 s. At the end of this time its speed is 120 km s-1 in the same direction.
Find
(i) The space craft's average acceleration while the motors were firing
(ii) The distance travelled by the space craft in the first 10 s after the rocket motors were started, the motors being in action for only 6 s.
If a body is moving with a constant velocity its acceleration is ______.
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.
Write the SI unit of retardation.
A car traveling at 60 km/h, stops on applying brakes in 10 seconds. What is its acceleration?
A bus can accelerate with an acceleration of 1 m/s2 . Find the minimum time for the bus to attain the speed of 100 km/s from 50 km /s.
