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The speed-time graph for a car is shown in Fig. [https://lh3.

Science

Class 9

NCERT

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A ball is gently dropped from a height of

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. 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?

The speed-time graph for a car is shown in Fig.

(a)

Find how far does the car travel in the first

4

seconds. Shade the area on the graph that represents the distance travelled by the car during the period.

(b)

Which part of the graph represents uniform motion of the car?

State which of the following situations are possible and give an example for each of these:

(a)

An object with a constant acceleration but with zero velocity.

(b)

An object moving in a certain direction with an acceleration in the perpendicular direction.

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Question

Medium

Solving time: 3 mins

The speed-time graph for a car is shown in Fig.

$(a)$ Find how far does the car travel in the first $4$ seconds. Shade the area on the graph that represents the distance travelled by the car during the period.
$(b)$ Which part of the graph represents uniform motion of the car?

Views: 6,917 students

Updated on: Aug 8, 2023

Book:

Science (NCERT)

Found 8 tutors discussing this question

Eleanor Discussed

The speed-time graph for a car is shown in Fig.

(a)

Find how far does the car travel in the first

4

seconds. Shade the area on the graph that represents the distance travelled by the car during the period.

(b)

Which part of the graph represents uniform motion of the car?

14 mins ago

Discuss this question LIVE

14 mins ago

Text solutionVerified

(a)

The total number of divisions on horizontal axis for

2 s

5

The total number of divisions on vertical axis for

2 m / s

3

The total displacement of the car during these two seconds will be given as the area under all these squares.

The area under the

(3 \times 5)

squares is given as:

A_{15} = 2 \times 2 = 4

So, the area under one small square is :

A_{1} = \frac{4}{15}

Now, the area under the graph for

4 sec

is:

the number of squares under the graph is :

n = 57

small squares

+ 6

half small squares

So, total number of squares

= 60

So, the distance traveled by the car is the area under the curve.

S = 60 \times \frac{4}{15}

S = 16 m

(b)

The car moves under the uniform motion after the instant

t = 6 s

because after this instant, the speed of the car becomes constant.

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Practice more questions from Science (NCERT)

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?

The speed-time graph for a car is shown in Fig.

(a)

Find how far does the car travel in the first

4

seconds. Shade the area on the graph that represents the distance travelled by the car during the period.

(b)

Which part of the graph represents uniform motion of the car?

State which of the following situations are possible and give an example for each of these:

(a)

An object with a constant acceleration but with zero velocity.

(b)

An object moving in a certain direction with an acceleration in the perpendicular direction.

View all

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Question Text	The speed-time graph for a car is shown in Fig. $(a)$ Find how far does the car travel in the first $4$ seconds. Shade the area on the graph that represents the distance travelled by the car during the period. $(b)$ Which part of the graph represents uniform motion of the car?
Updated On	Aug 8, 2023
Topic	Motion
Subject	Science
Class	Class 9
Answer Type	Text solution:1 Video solution: 15
Upvotes	1606
Avg. Video Duration	9 min

The speed-time graph for a car is shown in Fig.

$(a)$ Find how far does the car travel in the first $4$ seconds. Shade the area on the graph that represents the distance travelled by the car during the period.
$(b)$ Which part of the graph represents uniform motion of the car?

Text solutionVerified

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The speed-time graph for a car is shown in Fig.

$(a)$ Find how far does the car travel in the first $4$ seconds. Shade the area on the graph that represents the distance travelled by the car during the period.
$(b)$ Which part of the graph represents uniform motion of the car?