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प्रश्न
The graph shows how the velocity of a scooter varies with time in 50 s.
Work out: Deceleration
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उत्तर
Scooter is decelerating in the region 8 to C.
a= (v - u)/t = (0 - 20)/20 = -1 m-2 .
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संबंधित प्रश्न
What is meant by the term retardation? Name its S.I. unit.
A bullet initially moving with a velocity 20 m/s strikes a target and comes to rest after penetrating a distance 10 cm into the target. Calculate the retardation caused by the target.
A racing car is moving with a velocity of 50 m/s. On
applying brakes, it is uniformly retarded and comes to rest in 20 seconds. Calculate its acceleration.
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.
Define acceleration.
Distinguish between uniformly and non-uniformly accelerated motions.
The rate of change of velocity is ______.
If a body starts from rest, what can be said about the acceleration of the body?
Assertion: Position-time graph of a stationary object is a straight line parallel to the time axis.
Reason: For a stationary object, the position does not change with time.
