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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
The change in velocity of a motorbike is 54 kmh−1 in one minute. Calculate its acceleration in (a) ms−2 (b) kmh−2.
A truck running at 90 kmh−1, is brought to rest over a distance of 25 m. Calculate the retardation and time for which brakes are applied.
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.
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- retardation
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Write the SI unit of acceleration and retardation.
A body has an acceleration of -3.5 ms-2. What is its retardation?
State whether true or false. If false, correct the statement.
Acceleration can get negative value also.
Assertion: The accelerated motion of an object may be due to change in magnitude of velocity or direction or both of them.
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It is possible to have objects moving with uniform speed but variable acceleration.
