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प्रश्न
Correct your friend who says that acceleration gives the idea of how fast the position changes.
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उत्तर
There are two possible answers:
Velocity gives an idea of how fast the position changes, or Acceleration gives an idea of how fast the velocity changes.
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संबंधित प्रश्न
A car travels with uniform velocity of 25 m s-1 for 5 s. The brakes are then applied and the car is uniformly retarded and comes to rest in further 10 s. Find:
- The distance which the car travels before the brakes are applied,
- Retardation and
- The distance travelled by car after applying the brakes.
If a body is moving with a constant velocity its acceleration is ______.
State its value in C.G.S. as well as in S.I. system.
When is the acceleration due to gravity positive?
A racing car, initially at rest, picks up a velocity of 180 kmh−1 in 4.5 s. Calculate
- acceleration
- distance covered by the car.
What is the SI unit of acceleration?
The acceleration of a body is 8.5 ms-2. What does this statement mean?
A car traveling at 60 km/h, stops on applying brakes in 10 seconds. What is its acceleration?
What do you mean by constant acceleration?
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.
The slope of a velocity-time graph gives ______.
If the velocity of a body does not change, then its acceleration is ______.
The Unit of acceleration is ______.
The speed of a particle is constant. Will it have acceleration? Justify with an example.
When an object undergoes acceleration ______.
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 ______.
The value of acceleration for a body at rest is ______.
An object can be moving with uniform speed but with variable acceleration.
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.
