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प्रश्न
Define acceleration. State its unit.
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उत्तर
Acceleration is the rate of change of velocity with time.
Its SI unit is metre/second2 (m/s2).
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संबंधित प्रश्न
Distinguish between acceleration and retardation.
Figure given below shows a velocity-time graph for a car starting from rest. The graph has three parts AB, BC and CD.
(a) Is the magnitude of acceleration higher or lower than that of retardation ? Give a reason .
(b) Compare the magnitude of acceleration and retardation .
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.
The acceleration of a moving body is constant in magnitude and direction. Must the path of the body be a straight line?
If not, given an example.
Convert the following acceleration:
1/36 m/s2 into km/h2
The graph shows how the velocity of a scooter varies with time in 50 s.
Work out: Deceleration
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.
A car is being driven at a speed of 20ms-1 when brakes are applied to bring it to rest in 5 s. The deceleration produced in this case will be ______.
Acceleration is a scalar.
