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What do you mean by constant acceleration? - Science

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प्रश्न

What do you mean by constant acceleration?

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उत्तर

A body is said to have constant acceleration, if it travels is a straight line and its velocity increases or decreases by equal magnitude in equal intervals of time.
Ex: the motion of a freely falling body.

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पाठ 2: Force and Motion - Evaluation [पृष्ठ २६]

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सामाचीर कलवी Science - Term 1 [English] Class 7 TN Board
पाठ 2 Force and Motion
Evaluation | Q VI. 3. | पृष्ठ २६

संबंधित प्रश्‍न

Give one example of the following motion:

Uniform retardation


The unit of retardation is ____________


A toy car initially moving with uniform velocity of 18 km h-1 comes to a stop in 2 s. Find the retardation of the car in S.I. units.


A body falls freely from a certain height. Show graphically the relation between the distance fallen and square of time. How will you determine g from this graph?


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 .


When is the acceleration due to gravity positive?


From the velocity – time graph given below, calculate deceleration in region BC.


Diagram is given below shows velocity – time graph of car P and Q, starting from the same place and in the same direction. Calculate the Acceleration of car P.


A motorbike, initially at rest, picks up a velocity of 72 kmh−1 over a distance of 40 m. Calculate

  1. acceleration
  2. time in which it picks up above velocity.

The acceleration of a body is 8.5 ms-2. What does this statement mean?


Write the SI unit of acceleration and retardation.


The speed of a car increases from 10 km/h to 64 km/h in 10 seconds. What will be its acceleration?


A car starts from rest and it is travelling with a velocity of 20 m/s in 10 s. What is its acceleration?


State whether true or false. If false, correct the statement.

Acceleration can get negative value also.


The speed of a particle is constant. Will it have acceleration? Justify with an example.


A quantity has a value of 16ms-2. It is the ______.


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 ______.


When a body is said to be in

  1. uniform acceleration
  2. non–uniform acceleration?

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