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Science

Class 9

NCERT

Chapter 1: Matter in Our Surroundings

9 questions

Chapter 2: Is Matter Around Us Pure?

13 questions

Chapter 3: Atoms and Molecules

16 questions

Chapter 4: Structure of the Atom

19 questions

Chapter 5: The Fundamental Unit of Life

10 questions

Chapter 6: Tissues

15 questions

Chapter 7: Diversity in Living Organisms

6 questions

Chapter 8: Motion

18 questions

A driver of a car travelling at

52

h^{- 1}

applies the brakes and accelerates uniformly in the opposite direction. The car stops in

5

s. Another driver going at

3

h^{- 1}

in another car applies his brakes slowly and stops in

10

s. On the same graph paper, plot the speed versus time graphs for the two cars. Which of the two cars travelled farther after the brakes were applied?

Fig shows the distance-time graph of three objects A, B and C. Study the graph and answer the following questions:

(a)

Which of the three is travelling the fastest?

(b)

Are all three ever at the same point on the road?

(c)

How far has C travelled when B passes A?

(d)

How far has B travelled by the time it passes C?

A ball is gently dropped from a height of

20 m

. If its velocity increases uniformly at the rate of

10 m s^{- 2}

, with what velocity will it strike the ground? After what time will it strike the ground?

View all question

Chapter 9: Force and Laws of Motion

29 questions

Chapter 10: Work and Energy

23 questions

Chapter 11: Sound

25 questions

Chapter 12: Why do We Fall Ill?

6 questions

Chapter 13: Natural Resourses

6 questions

Chapter 14: Improvement in Food Resources

Chapter 15: Gravitation

29 questions

Question

Hard

Solving time: 5 mins

Fig shows the distance-time graph of three objects A, B and C. Study the graph and answer the following questions:
$(a)$ Which of the three is travelling the fastest?
$(b)$ Are all three ever at the same point on the road?
$(c)$ How far has C travelled when B passes A?
$(d)$ How far has B travelled by the time it passes C?

Views: 6,853 students

Updated on: Jul 16, 2023

Book:

Science (NCERT)

Found 6 tutors discussing this question

Levi Discussed

Fig shows the distance-time graph of three objects A, B and C. Study the graph and answer the following questions:

(a)

Which of the three is travelling the fastest?

(b)

Are all three ever at the same point on the road?

(c)

How far has C travelled when B passes A?

(d)

How far has B travelled by the time it passes C?

10 mins ago

Discuss this question LIVE

10 mins ago

Text solutionVerified

(a) The slope of distance-time graph gives the speed of the objects.

As the slope of object

(B)

is the greatest among all, thus

B

has the largest speed and hence it is the fastest among all the objects.

(b) : As the curve of the objects do not intersect with each other even once, hence they cannot be at the same point on the road at the same time.

7

small represents

4 km

∴

1

small line

= \frac{4}{7} = 0.57

Position of C at the instant B passes A is

8 km

(d) ; Position of B at the instant it passes C is 2nd small line above

4 km

i.e

4 + 2 \times 0.57 = 5.14 km

∴

Distance traveled by B

= 5.14 - 0 = 5.14 km

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Practice more questions from Science (NCERT)

A driver of a car travelling at

52

h^{- 1}

applies the brakes and accelerates uniformly in the opposite direction. The car stops in

5

s. Another driver going at

3

h^{- 1}

in another car applies his brakes slowly and stops in

10

s. On the same graph paper, plot the speed versus time graphs for the two cars. Which of the two cars travelled farther after the brakes were applied?

Fig shows the distance-time graph of three objects A, B and C. Study the graph and answer the following questions:

(a)

Which of the three is travelling the fastest?

(b)

Are all three ever at the same point on the road?

(c)

How far has C travelled when B passes A?

(d)

How far has B travelled by the time it passes C?

A ball is gently dropped from a height of

20 m

. If its velocity increases uniformly at the rate of

10 m s^{- 2}

, with what velocity will it strike the ground? After what time will it strike the ground?

View all

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Question Text	Fig shows the distance-time graph of three objects A, B and C. Study the graph and answer the following questions: $(a)$ Which of the three is travelling the fastest? $(b)$ Are all three ever at the same point on the road? $(c)$ How far has C travelled when B passes A? $(d)$ How far has B travelled by the time it passes C?
Updated On	Jul 16, 2023
Topic	Motion
Subject	Science
Class	Class 9
Answer Type	Text solution:1 Video solution: 7
Upvotes	757
Avg. Video Duration	3 min

Text solutionVerified

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