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प्रश्न
Figure given below shows a velocity-time graph for a car starting from rest. The graph has three parts AB, BC and CD.
Which part of graph shows motion with uniform
(a) velocity (b) acceleration (c) retardation ?
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उत्तर
(a) BC shows motion with uniform velocity.
(b) AB shows motion with uniform acceleration.
(c) CD shows motion with uniform retardation.
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संबंधित प्रश्न
When is the acceleration due to gravity negative?
Is it possible for an accelerating body to have constant speed?
Sketch the shape of the velocity-time graph for a body moving with:
Uniform acceleration.
The graph shows how the velocity of a scooter varies with time in 50 s.
Work out: Acceleration.
A car accelerates to a velocity of 30 m/s in 10 s and then decelerates for 20 s so that it stops. Draw a velocity-time graph to represent the motion and find:
The Deceleration.
A car accelerates to a velocity of 30 m/s in 10 s and then decelerates for 20 s so that it stops. Draw a velocity-time graph to represent the motion and find:
Distance travelled
Correct your friend who says that acceleration gives the idea of how fast the position changes.
Assertion: The accelerated motion of an object may be due to change in magnitude of velocity or direction or both of them.
Reason: Acceleration can be produced only by change in magnitude of the velocity. It does not depend the direction.
If a body starts from rest, what can be said about the acceleration of the body?
It is possible to have objects moving with uniform speed but variable acceleration.
