Modern's abc+ Of Science - Physics For Class IX>Chapter 1 - Motion>Summative Assessment Some Solved CBSE Sample Questions>Q 19

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Earn 100

The displacement-time graph for a body at rest is

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Important Questions on Motion

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IMPORTANT

Modern's abc+ Of Science - Physics For Class IX>Chapter 1 - Motion>Summative Assessment Some Solved CBSE Sample Questions>Q 20

A body travels

2 m

in the first

2 s

and

2.2 m

in the next

4 s

with uniform deceleration. The velocity of the body at the end of

9 s

is

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

A particle moves with constant acceleration. If

v_{1}

,

v_{2}

and

v_{3}

are the average velocities in the three successive intervals

t_{1}

,

t_{2}

and

t_{3}

of time, then the correct relation is

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

A body starts from a point

O

with velocity

v

and uniform acceleration

a

. The direction of acceleration is reversed when the velocity of the body becomes

5 v

. The velocity of the body when it is again at point

O

will be

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

Which of the following is a false statement?

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

If a body starts from a point and returns back to the same point, then its

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Modern's abc+ Of Science - Physics For Class IX>Chapter 1 - Motion>Summative Assessment Some Solved CBSE Sample Questions>Q 25

An open car is moving with uniform velocity. A person sitting in the car projected a ball vertically upwards. The ball

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Modern's abc+ Of Science - Physics For Class IX>Chapter 1 - Motion>Summative Assessment Some Solved CBSE Sample Questions>Q 26

A

130 m

long train is moving in a direction with speed

20 m s^{- 1}

. Another train moving in opposite direction with

30 m s^{- 1}

and

120 m

long crosses the first train in a time

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Modern's abc+ Of Science - Physics For Class IX>Chapter 1 - Motion>Summative Assessment Some Solved CBSE Sample Questions>Q 27

A stone is thrown vertically upwards by a boy. It returns to his hands in

3

seconds. How high does the stone rise?

(g = 9.8 m s^{- 2})

.