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प्रश्न
When is the acceleration due to gravity positive?
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उत्तर
If a body falls towards the earth, then value of acceleration due to gravity is positive.
संबंधित प्रश्न
Figure shows the velocity-time graphs for two cars A and B moving in the same direction. Which car has greater acceleration? Give reasons to your answer.
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?
A body falls freely from a certain height. Show graphically the relation between the distance fallen and square of time. How will you determine g from this graph?
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 body falls towards the earth. Does it have positive or negative acceleration?
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The Deceleration.
The rate of change of velocity is ______.
The acceleration of the body that moves with a uniform velocity will be ______.
A quantity has a value of 16ms-2. It is the ______.
It is possible to have objects moving with uniform speed but variable acceleration.
