NCERT Solutions | Class 7 Science Chapter 13 | Motion and Time

CBSE Solutions | Science Class 7

Check the below NCERT Solutions for Class 7 Science Chapter 13 Motion and Time Pdf free download. NCERT Solutions Class 7 Science were prepared based on the latest exam pattern. We have Provided Motion and Time Class 7 Science NCERT Solutions to help students understand the concept very well.

NCERT | Class 7 Science

NCERT Solutions Class 7 Science
Book:	National Council of Educational Research and Training (NCERT)
Board:	Central Board of Secondary Education (CBSE)
Class:	7th
Subject:	Science
Chapter:	13
Chapters Name:	Motion and Time
Medium:	English

Motion and Time | Class 7 Science | NCERT Books Solutions

You can refer to MCQ Questions for Class 7 Science Chapter 13 Motion and Time to revise the concepts in the syllabus effectively and improve your chances of securing high marks in your board exams.

science class 7 pdf, Question 1.

Classify the following as motion along a straight line, circular or oscillatory motion:

Motion of your hands while running.
Motion of a horse pulling a cart on a straight road.
Motion of a child in a merry-go-round.
Motion of a child on a see-saw.
Motion of the hammer of an electric bell.
Motion of a train on a straight bridge.

cbse science class 7 solutions, Answer :

Oscillatory
Straight line
Circular
Oscillatory
Oscillatory
Straight line

cbse class 7 science book, Question 2.

Which of the following are not correct?
(i) The basic unit of time is second.
(ii) Every object moves at a constant speed.
(iii) Distance between two cities is measured in kilometers.
(iv) The time period of a given pendulum is not constant.
(v) The speed of a train is expressed in m/h.

ncert class 7 science Chapter 13 question answer, Answer :

(ii), (iv), (v).

cbse class 7 science Chapter 13, Question 3.

A simple pendulum takes 32 sec. to complete 20 oscillations. What is the time period of the pendulum?

cbse science class 7 solutions, Answer :

Time taken for 20 oscillations = 32 s
Time taken for 1 oscillation = \(\frac { 32 s }{ 20 } \)
Hence, Time period = 1.6 s

cbse class 7 science notes pdf, Question 4.

The distance between the two stations is 240 km. A train takes 4 hours to cover this distance. Calculate the speed of the train.

ncert class 7 science Chapter 13 question answer, Answer :

Given, distance = 240 km
time = 4 h
speed = \(\frac { distance }{ time } \) = \(\frac { 240 km }{ 4 h } \) = 60 km/h.

cbse class 7 science syllabus pdf, Question 5.

The odometer of a car reads 57321.0 km when the clock shows the time 08: 30 AM. What is the distance moved by car, if at 08: 50 AM, the odometer reading has changed to 57336.0 km? Calculate the speed of the car in km/min during this time. Express the speed in km/h also.

cbse science class 7 solutions, Answer :

In this question, it is given that,
Initial reading of odometer = 57321.0 km
Final reading of odometer = 57336.0 km
Initial time = 08.30 AM
Final time = 08.50 AM
Now, total distance covered = Final reading of odometer – Initial reading of odometer
= 57336.0 km – 57321.0 km = 15.0 km
Total time taken = Final time – Initial time
= 08.50 AM – 08.30 AM
= 20 min
We know that,
speed = \(\frac { Distance\quad covered }{ Time\quad taken } =\frac { 15Km }{ 20min } =0.75Km/min\)
Speed in km/h = 0.75 x 60 (1 hr = 60 min) = 45 km/hr
Therefore, the distance moved by the car =15 km
and the speed of the car = 0.75 km/min and 45 km/h.

cbse science class 7 book, Question 6.

Salma takes 15 minutes from her house to reach her school on a bicycle. If the bicycle has a speed of 2 m/s, calculate the distance between her house and the school.

ncert class 7 science Chapter 13 question answer, Answer :

Given, Speed = 2 m/s
Time =15 min = 15 x 60 s = 900 s
distance = speed x time = 2 m/s x 900 s = 1800 m
\(\frac { 1800 m }{ 1000 } \) km = 1.8 km

cbse science class 7 book pdf, Question 7.

Show the shape of the distance-time graph for the motion in the following cases:
(i) A car moving at a constant speed.
(ii) A car parked on a side road.

cbse science class 7 solutions, Answer :

NCERT Solutions for Class 7 Science Chapter 13 Motion and Time Q.7

cbse science class 7 Chapter 13, Question 8.

Which of the following relations is correct?
(i) Speed = Distance × Time
(ii) Speed = \(\frac { Distance }{ Time }\)
(iii) Speed = \(\frac { Time }{ Distance }\)
(iv) Speed = \(\frac { 1 }{ Distance\times Time } \)

ncert class 7 science Chapter 13 question answer, Answer :

(ii) Speed = \(\frac { Distance }{ Time }\)

cbse science class 7 syllabus, Question 9.

The basic unit of speed is:
(i) km/min
(ii) m/min
(iii) km/h
(iv) m/s

cbse science class 7 solutions, Answer :

(iv) m/s

class 7 science Chapter 13, Question 10.

A car moves with a speed of 40 km/h for 15 minutes and then with a speed of 60 km/h for the next 15 minutes. The total distance covered by the car is:
(i) 100 km
(ii) 25 km
(iii) 15 km
(iv) 10 km

ncert class 7 science Chapter 13 question answer, Answer :

(ii) 25 km

NCERT Class 7 Science book, Question 11.

Suppose the two photographs shown in Figures A and B had been taken at an interval of 10 seconds. If a distance of 100 metres is shown by 1 cm in these photographs, calculate the speed of the red car.
NCERT Solutions for Class 7 Science Chapter 13 Motion and Time Q.11

NCERT Solutions for Class 7 Science Chapter 13 Motion and Time Q.11

cbse science class 7 solutions, Answer :

Do it yourself.

NCERT Class 7 Science book PDF, Question 12.

The figure shows the distance-time graph for the motion of two vehicles A and B. Which one of them is moving faster?
study rankers class 7 science Chapter 13 Motion and Time Q.12