Modern's abc+ Of Science - Physics For Class IX>Chapter 1 - Motion>Summative Assessment>Q 21

EASY

9th CBSE

IMPORTANT

Earn 100

Define acceleration.

Important Questions on Motion

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9th CBSE

IMPORTANT

Modern's abc+ Of Science - Physics For Class IX>Chapter 1 - Motion>Summative Assessment>Q 22

What is the SI unit of acceleration?

MEDIUM

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IMPORTANT

Modern's abc+ Of Science - Physics For Class IX>Chapter 1 - Motion>Summative Assessment>Q 23

What do we mean by saying that the acceleration of a body is

3 m s^{- 2}

?

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IMPORTANT

Modern's abc+ Of Science - Physics For Class IX>Chapter 1 - Motion>Summative Assessment>Q 24

When do we say that a body is retarding or decelerating?

MEDIUM

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IMPORTANT

Modern's abc+ Of Science - Physics For Class IX>Chapter 1 - Motion>Summative Assessment>Q 1

What is the difference between average speed and instantaneous speed?

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IMPORTANT

Modern's abc+ Of Science - Physics For Class IX>Chapter 1 - Motion>Summative Assessment>Q 2

Can average speed and instantaneous speed be equal? Explain.

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IMPORTANT

Modern's abc+ Of Science - Physics For Class IX>Chapter 1 - Motion>Summative Assessment>Q 3

Define uniform speed. How is it different from uniform velocity?

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IMPORTANT

Modern's abc+ Of Science - Physics For Class IX>Chapter 1 - Motion>Summative Assessment>Q 4

Can be a body be accelerated, if it is moving with constant speed?

MEDIUM

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IMPORTANT

Modern's abc+ Of Science - Physics For Class IX>Chapter 1 - Motion>Summative Assessment>Q 5

If a body covers a distance $x$ with speed $v_{1}$ and then it covers another distance $x$ with speed $v_{2}$ , find the average speed for the whole journey.