Instruction: The table given below shows distance (in cm ) travelled by the bodies A, B and C. Read this data carefully and answer the question which follow. Distance (in cm ) covered by different bodies Time Body A Body B Body C 1 st second 20 20 20 2 nd second 20 36 60 3 rd second 20 24 100 4 th second 20 30 140 5 th second 20 48 180 Which of the bodies is moving with constant speed?

Among the three bodies, the body A is moving with constant speed as the distance covered by it is 20 cm each second which is the same throughout the time considered.

Instruction: The table given below shows distance (in cm ) travelled by the bodies A, B and C. Read this data carefully and answer the question which follow. Distance (in cm ) covered by different bodies Time Body A Body B Body C 1 st second 20 20 20 2 nd second 20 36 60 3 rd second 20 24 100 4 th second 20 30 140 5 th second 20 48 180 Which of the bodies is moving with constant acceleration?

Among the three bodies, the body C is moving with constant acceleration as distance covered by it is increasing by 40 cm in each second.

Instruction: The table given below shows distance (in cm ) travelled by the bodies A, B and C. Read this data carefully and answer the question which follow. Distance (in cm ) covered by different bodies Time Body A Body B Body C 1 st second 20 20 20 2 nd second 20 36 60 3 rd second 20 24 100 4 th second 20 30 140 5 th second 20 48 180 Which of the bodies covers maximum distance in 3 rd second?

From the given table, among the three bodies, the body C is covering the maximum distance in 3 rd second. It is covering 100 cm whereas, the body A and body B are covering 20 cm and 24 cm respectively. So, C is having maximum speed also at that time than the other two.

Instruction: The table given below shows distance (in cm ) travelled by the bodies A, B and C. Read this data carefully and answer the question which follow. Distance (in cm ) covered by different bodies Time Body A Body B Body C 1 st second 20 20 20 2 nd second 20 36 60 3 rd second 20 24 100 4 th second 20 30 140 5 th second 20 48 180 Which of the bodies covers minimum distance in 3 rd second?

From the given table, among the three bodies, the body A is covering the minimum distance in 3 rd second. It is covering 20 cm whereas, the body B and body C are covering 24 cm and 100 cm respectively. So, speed of A is minimum as compared to other two bodies at that point of time.

Instruction: The table given below shows distance (in cm ) travelled by the bodies A, B and C. Read this data carefully and answer the question which follow. Distance (in cm ) covered by different bodies Time Body A Body B Body C 1 st second 20 20 20 2 nd second 20 36 60 3 rd second 20 24 100 4 th second 20 30 140 5 th second 20 48 180 Which of the bodies is moving with non-uniform acceleration?

From the given table, among the three bodies, the body B is moving with non-uniform acceleration. The distances covered by it during the entire motion are different for each second and changing unequally in each interval of time.

An object is moving along a straight line with uniform acceleration. The following table gives the velocity of the object at various instants of time. Time (in s ) 0 1 2 3 4 5 6 Velocity (in m / s ) 2 4 6 8 10 12 14 Plot the graph. From the graph, find the velocity of the object at the end of 2 . 5 seconds.

The velocity-time graph of the object moving along a straight line with uniform acceleration is shown as under: From the graph, the velocity of the object at the end of 2 . 5 seconds is 7 m s - 1 .

MEDIUM

9th CBSE

IMPORTANT

Earn 100

Define acceleration and state its SI unit. For motion along a straight line, when do we consider the acceleration to be (i) positive (ii) negative? Give an example of a body in uniform acceleration.

Important Questions on Motion

MEDIUM

9th CBSE

IMPORTANT

Together with Science Class 9>Chapter 8 - Motion>ASSESS YOURSELF>Q 37

Find the total displacement of the body from the following graph:

Question Image

EASY

9th CBSE

IMPORTANT

Together with Science Class 9>Chapter 8 - Motion>ASSESS YOURSELF>Q 38

Instruction: The table given below shows distance (in $cm$ ) travelled by the bodies A, B and C.

Read this data carefully and answer the question which follow.

Distance (in $cm$ ) covered by different bodies

Time	Body A	Body B	Body C
$1^{st}$ second	$20$	$20$	$20$
$2^{nd}$ second	$20$	$36$	$60$
$3^{rd}$ second	$20$	$24$	$100$
$4^{th}$ second	$20$	$30$	$140$
$5^{th}$ second	$20$	$48$	$180$

Which of the bodies is moving with constant speed?

EASY

9th CBSE

IMPORTANT

Together with Science Class 9>Chapter 8 - Motion>ASSESS YOURSELF>Q 38

Instruction: The table given below shows distance (in $cm$ ) travelled by the bodies A, B and C.

Read this data carefully and answer the question which follow.

Distance (in $cm$ ) covered by different bodies

Time	Body A	Body B	Body C
$1^{st}$ second	$20$	$20$	$20$
$2^{nd}$ second	$20$	$36$	$60$
$3^{rd}$ second	$20$	$24$	$100$
$4^{th}$ second	$20$	$30$	$140$
$5^{th}$ second	$20$	$48$	$180$

Which of the bodies is moving with constant acceleration?

EASY

9th CBSE

IMPORTANT

Together with Science Class 9>Chapter 8 - Motion>ASSESS YOURSELF>Q 38

Instruction: The table given below shows distance (in $cm$ ) travelled by the bodies A, B and C.

Read this data carefully and answer the question which follow.

Distance (in $cm$ ) covered by different bodies

Time	Body A	Body B	Body C
$1^{st}$ second	$20$	$20$	$20$
$2^{nd}$ second	$20$	$36$	$60$
$3^{rd}$ second	$20$	$24$	$100$
$4^{th}$ second	$20$	$30$	$140$
$5^{th}$ second	$20$	$48$	$180$

Which of the bodies covers maximum distance in $3^{rd}$ second?

EASY

9th CBSE

IMPORTANT

Together with Science Class 9>Chapter 8 - Motion>ASSESS YOURSELF>Q 38

Instruction: The table given below shows distance (in $cm$ ) travelled by the bodies A, B and C.

Read this data carefully and answer the question which follow.

Distance (in $cm$ ) covered by different bodies

Time	Body A	Body B	Body C
$1^{st}$ second	$20$	$20$	$20$
$2^{nd}$ second	$20$	$36$	$60$
$3^{rd}$ second	$20$	$24$	$100$
$4^{th}$ second	$20$	$30$	$140$
$5^{th}$ second	$20$	$48$	$180$

Which of the bodies covers minimum distance in $3^{rd}$ second?

EASY

9th CBSE

IMPORTANT

Together with Science Class 9>Chapter 8 - Motion>ASSESS YOURSELF>Q 38

Instruction: The table given below shows distance (in $cm$ ) travelled by the bodies A, B and C.

Read this data carefully and answer the question which follow.

Distance (in $cm$ ) covered by different bodies

Time	Body A	Body B	Body C
$1^{st}$ second	$20$	$20$	$20$
$2^{nd}$ second	$20$	$36$	$60$
$3^{rd}$ second	$20$	$24$	$100$
$4^{th}$ second	$20$	$30$	$140$
$5^{th}$ second	$20$	$48$	$180$

Which of the bodies is moving with non-uniform acceleration?

MEDIUM

9th CBSE

IMPORTANT

Together with Science Class 9>Chapter 8 - Motion>ASSESS YOURSELF>Q 39

An object is moving along a straight line with uniform acceleration. The following table gives the velocity of the object at various instants of time.

Time (in $s$ )	$0$	$1$	$2$	$3$	$4$	$5$	$6$
Velocity (in $m / s$ )	$2$	$4$	$6$	$8$	$10$	$12$	$14$

Plot the graph.

From the graph, find the velocity of the object at the end of $2.5$ seconds.

MEDIUM

9th CBSE

IMPORTANT

Together with Science Class 9>Chapter 8 - Motion>ASSESS YOURSELF>Q 39

An object is moving along a straight line with uniform acceleration. The following table gives the velocity of the object at various instants of time.

Time (in $s$ )	$0$	$1$	$2$	$3$	$4$	$5$	$6$
Velocity (in $m s^{- 1}$ )	$2$	$4$	$6$	$8$	$10$	$12$	$14$

Plot the graph.

From the graph, calculate the acceleration.

Define acceleration and state its SI unit. For motion along a straight line, when do we consider the acceleration to be (i) positive (ii) negative? Give an example of a body in uniform acceleration.

Important Questions on Motion

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