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प्रश्न
What is meant by the term retardation? Name its S.I. unit.
उत्तर
Retardation is the decrease in velocity per second.
Its SI unit is metre/second2 (m/s2).
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संबंधित प्रश्न
Distinguish between acceleration and retardation.
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.
The velocity-time graph for a uniformly retarded body is a straight line inclined to the time axis with an obtuse angle. How is retardation calculated from the velocity-time graph?
Draw velocity – time graph for the following situation:
When a body is moving with variable velocity and variable acceleration.
What does a positive acceleration mean?
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?
State if the following situation is possible:
A body moving with constant acceleration but with Zero velocity.
Sketch the shape of the velocity-time graph for a body moving with:
Uniform acceleration.
If a body starts from rest, what can be said about the acceleration of the body?
Assertion: A negative acceleration of a body can be associated with speeding up of the body.
Reason: Increase in the speed of a moving body is independent of its direction of motion.
