Together with Science Class 9>Chapter 8 - Motion>ASSESS YOURSELF>Q 3

EASY

9th CBSE

IMPORTANT

Earn 100

To find the height of a building, a student is following the steps as given below. The sequence of the steps is _____.
A: Drops a stone from the top of the building.
B: Simultaneously, starts a clock.
C: Stops the clock as the stone lands on the ground.
D: Follows the relation $h = \frac{1}{2} g t^{2}$ .

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Important Questions on Motion

MEDIUM

9th CBSE

IMPORTANT

Together with Science Class 9>Chapter 8 - Motion>ASSESS YOURSELF>Q 4

A body moving in a circle of radius

r

, covers

\frac{3}{4} th

of the circle. The ratio of the distance to displacement is

EASY

9th CBSE

IMPORTANT

Together with Science Class 9>Chapter 8 - Motion>ASSESS YOURSELF>Q 5

A car travels

10 m

in

5

seconds,

20 m

in next

10

seconds and

30 m

in the last

10

seconds. The average speed of the motion is

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9th CBSE

IMPORTANT

Together with Science Class 9>Chapter 8 - Motion>ASSESS YOURSELF>Q 6

Question Image

Using the given $v - t$ graph, one can conclude:

A: Displacement in ( $0 - 4$ ) seconds is equal to the displacement in ( $4 - 6$ ) seconds.
B: Acceleration is $2.5 m s^{- 2}$ in $OA$ and zero in $AB$ .
C: Acceleration is negative in time ( $6 - 8$ ) seconds.

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9th CBSE

IMPORTANT

Together with Science Class 9>Chapter 8 - Motion>ASSESS YOURSELF>Q 7

Three students P, Q and R observing an object moving in a straight line draw graphs as given below:
Question Image

The incorrect among them is -

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9th CBSE

IMPORTANT

Together with Science Class 9>Chapter 8 - Motion>ASSESS YOURSELF>Q 8

(i)

v =

constant : Uniform motion
(ii)

a =

constant : _____

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9th CBSE

IMPORTANT

Together with Science Class 9>Chapter 8 - Motion>ASSESS YOURSELF>Q 9

A: A body moving in a circle has an acceleration directed towards the centre.
B: Uniform circular motion is an example of variable acceleration.
C: Linear velocity of a body moving in a circle differs with the distance from the axis.

EASY

9th CBSE

IMPORTANT

Together with Science Class 9>Chapter 8 - Motion>ASSESS YOURSELF>Q 10

A particle is moving in a circular path of radius