NCERT Class 7 Science Motion and Time

Read and download NCERT Class 7 Science Motion and Time in NCERT book for Class 7 Science. You can download latest NCERT eBooks chapter wise in PDF format free from Studiestoday.com. This Science textbook for Class 7 is designed by NCERT and is very useful for students. Please also refer to the NCERT solutions for Class 7 Science to understand the answers of the exercise questions given at the end of this chapter

NCERT Book for Class 7 Science Chapter 13 Motion and Time

Class 7 Science students should refer to the following NCERT Book Chapter 13 Motion and Time in Class 7. This NCERT Book for Class 7 Science will be very useful for exams and help you to score good marks

Chapter 13 Motion and Time NCERT Book Class 7

13 Motion and Time

In Class VI, you learnt about different types of motions. You learnt that a motion could be along a straight line, it could be circular or periodic. Can you recall these three types of motions? Table 13.1 gives some common examples of motions. Identify the type of motion in each case. It is common experience that the motion of some objects is slow while that of some others is fast

13.1 SLOW OR FAST

We know that some vehicles move faster than others. Even the same vehicle may move faster or slower at different times. Make a list of ten objects moving along a straight path. Group the motion of these objects as slow and fast. How did you decide which object is moving slow and which one is moving fast. If vehicles are moving on a road in the same direction, we can easily tell which one of them is moving faster than the other.

13.2 SPEED

You are probably familiar with the word speed. In the examples given above, a higher speed seems to indicate that a given distance has been covered in a shorter time, or a larger distance covered in a given time.

The most convenient way to find out which of the two or more objects is moving faster is to compare the distances moved by them in a unit time. Thus, if we know the distance covered by two buses in one hour, we can tell which one is slower. We call the distance covered by an object in a unit time as the speed of the object. When we say that a car is moving with a speed of 50 kilometres per hour, it implies that it will cover a distance of 50 kilometres in one hour. However, a car seldom moves with a constant speed for one hour. In fact, it starts moving slowly and then picks up speed. So, when we say that the car has a speed of 50 kilometres per hour, we usually consider only the total distance covered by it in one hour. We do not bother whether the car has been moving with a constant speed or not during thathour. The speed calculated here is actually the average speed of the car. In this book we shall use the term speed for average speed. So, for us the speed is the total distance covered divided by the total time taken. 

We can determine the speed of a given object once we can measure the time taken by it to cover a certain distance. In Class VI you learnt how to measure distances. But, how do we measure time? Let us find out.

Exercises

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

(i) Motion of your hands while running.

(ii) Motion of a horse pulling a cart on a straight road.

(iii) Motion of a child in a merry-go-round.

(iv) Motion of a child on a see-saw.

(v) Motion of the hammer of an electric bell.

(vi) Motion of a train on a straight bridge.

2. Which of the following are not correct?

(i) The basic unit of time is second.

(ii) Every object moves with a constant speed.

(iii) Distances between two cities are measured in kilometres.

(iv) The time period of a given pendulum is not constant.

(v) The speed of a train is expressed in m/h.

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

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

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 the 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.

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.

7. Show the shape of the distance-time graph for the motion in the following cases:

(i) A car moving with a constant speed.

(ii) A car parked on a side road.


Please refer to attached file for NCERT Class 7 Science Motion and Time

Chapter 01 Nutrition in Plants
NCERT Class 7 Science Nutrition in Plants
Chapter 02 Nutrition in Animals
NCERT Class 7 Science Nutrition in Animals
Chapter 03 Fibre to Fabric
NCERT Class 7 Science Fibre to Fabric
Chapter 05 Acids, Bases and Salts
NCERT Class 7 Science Acids Bases and Salts
Chapter 06 Physical and Chemical Changes
NCERT Class 7 Science Physical and Chemical Changes
Chapter 07 Weather, Climate and Adaptations of Animals to Climate
NCERT Class 7 Science Weather Climate and Adaptation
Chapter 08 Winds, Storms and Cyclones
NCERT Class 7 Science Winds Storms and Cyclones
Chapter 10 Respiration in Organisms
NCERT Class 7 Science Respiration in Organisms
Chapter 11 Transportation in Animals
NCERT Class 7 Science Transportation in Animals
Chapter 12 Reproduction in Plants
NCERT Class 7 Science Reproduction in Plants
Chapter 13 Motion and Time
NCERT Class 7 Science Motion and Time
Chapter 14 Electric Current and its Effects
NCERT Class 7 Science Electric Current and its Effects
Chapter 16 Water: A Precious Resource
NCERT Class 7 Science Water A Precious Resource
Chapter 17 Forests: Our Lifeline
NCERT Class 7 Science Forests Our Lifeline
Chapter 18 Wastewater Story
NCERT Class 7 Science Wastewater Story

Science NCERT Book Class 7 Chapter 13 Motion and Time

The above NCERT Books for Class 7 Science Chapter 13 Motion and Time have been published by NCERT for latest academic session. The textbook by NCERT for Chapter 13 Motion and Time Science Class 7 is being used by various schools and almost all education boards in India. Teachers have always recommended students to refer to Chapter 13 Motion and Time NCERT etextbooks as the exams for Class 7 Science are always asked as per the syllabus defined in these ebooks. These Class 7 Chapter 13 Motion and Time book for Science also includes collection of question. We have also provided NCERT solutions for Class 7 Science which have been developed by teachers of StudiesToday.com after thorough review of the latest book and based on pattern of questions in upcoming exams for Class 7 students.

NCERT Book Class 7 Science Chapter 13 Motion and Time

The latest NCERT book for Chapter 13 Motion and Time pdf have been published by NCERT based on the latest research done for each topic which has to be taught to students in all classes. The books for Class 7 Science Chapter 13 Motion and Time are designed to enhance the overall understanding of students. All Class 7 NCERT textbooks have been written in an easy to understand language which will help to enhance the overall level of Class 7 students. 

Chapter 13 Motion and Time NCERT Book Class 7 Science

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Class 7 Science Chapter 13 Motion and Time NCERT Book

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Class 7 Chapter 13 Motion and Time NCERT Book Science

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