NCERT Solutions Class 7 Science Chapter 13 Motion and Time have been provided below and is also available in Pdf for free download. The NCERT solutions for Class 7 Science have been prepared as per the latest syllabus, NCERT books and examination pattern suggested in Class 7 by CBSE, NCERT and KVS. Questions given in NCERT book for Class 7 Science are an important part of exams for Class 7 Science and if answered properly can help you to get higher marks. Refer to more Chapter-wise answers for NCERT Class 7 Science and also download more latest study material for all subjects. Chapter 13 Motion and Time is an important topic in Class 7, please refer to answers provided below to help you score better in exams
Chapter 13 Motion and Time Class 7 Science NCERT Solutions
Class 7 Science students should refer to the following NCERT questions with answers for Chapter 13 Motion and Time in Class 7. These NCERT Solutions with answers for Class 7 Science will come in exams and help you to score good marks
Chapter 13 Motion and Time NCERT Solutions Class 7 Science
NCERT Solutions for Class 7 Science for chaper 13 Motion and Time
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.
Answer
(i) Oscillatory motion
(ii)Straight line motion
(iii)Circular motion
(iv) Oscillatory motion
(v)Oscillatory motion
(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.
Time taken = 4 hrs
Speed of train = Distance/Time taken = 240/4 = 60 km/hr
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.
Answer
Initial reading of odometer = 57321.0 km
Final reading of odometer = 57336.0 km
Initial Time = 8:30 AM
Final Time = 8:50 AM
Total distance covered = Final reading of odometer - Initial reading of odometer
=57336.0 - 57321.0 = 15.0 km
20 minutes = 20/60 hrs = 1/3 hrs
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.
Answer
Speed of bicycle = 2 m/s
Time taken = 15 mins = 15 × 60 secs = 900 secs
A/q,
Speed = Distance/Time
⇒ Distance = Speed × Time = 2 × 900 metres = 1800 metres = 1.8 km
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.
Answer
(i)The graph will be a straight line passing through the origin.
8. Which of the following relations is correct?
(i) Speed = Distance × Time (ii) Speed = Distance/Time
(iii) Speed = Time/Distance (iv) Speed = 1/Distance × Time
Answer
(ii) Speed = Distance/Time
9. The basic unit of speed is:
(i) km/min (ii) m/min
(iii) km/h (iv) m/s
Answer
(iv) m/s
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
Answer
(ii) 25 km
Firstly, the car is moving with 40km/h for 15 minutes.
Total distance covered = 10 km + 15 km = 25 km
11. Suppose the two photographs, shown in Fig. 13.1 and Fig. 13.2, 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 blue car.
Answer
First, measure the distance with the help of scale and then proceed as given below.
Suppose the distance measured by scale is 2cm.
Multiply 2 with 100 to get the actual distance = 2 × 100 = 200 m. (1cm = 100m)
Interval time between the photos taken = 10 s.
Speed of the blue car = 200/10 m/s = 20 m/s
12. Fig. 13.15 shows the distance-time graph for the motion of two vehicles A and B. Which one of them is moving faster?
Answer
Vehicle A is moving faster because it has more slope than vehicle B. In distance-time graph, speed is measured by its slope.
13. Which of the following distance-time graphs shows a truck moving with speed which is not constant?
Option (iii) because the slope of the graph is not a straight line and hence it does not show a uniform motion.
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NCERT Solutions Class 7 Science Chapter 13 Motion and Time
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Chapter 13 Motion and Time Class 7 Science NCERT Solutions
The Class 7 Science NCERT Solutions Chapter 13 Motion and Time are designed in a way that will help to improve the overall understanding of students. The answers to each question in Chapter 13 Motion and Time of Science Class 7 has been designed based on the latest syllabus released for the current year. We have also provided detailed explanations for all difficult topics in Chapter 13 Motion and Time Class 7 chapter of Science so that it can be easier for students to understand all answers.
NCERT Solutions Chapter 13 Motion and Time Class 7 Science
Class 7 Science NCERT Solutions Chapter 13 Motion and Time is a really good source using which the students can get more marks in exams. The same questions will be coming in your Class 7 Science exam. Learn the Chapter 13 Motion and Time questions and answers daily to get a higher score. Chapter 13 Motion and Time of your Science textbook has a lot of questions at the end of chapter to test the students understanding of the concepts taught in the chapter. Students have to solve the questions and refer to the step-by-step solutions provided by Science teachers on studiestoday to get better problem-solving skills.
Chapter 13 Motion and Time Class 7 NCERT Solution Science
These solutions of Chapter 13 Motion and Time NCERT Questions given in your textbook for Class 7 Science have been designed to help students understand the difficult topics of Science in an easy manner. These will also help to build a strong foundation in the Science. There is a combination of theoretical and practical questions relating to all chapters in Science to check the overall learning of the students of Class 7.
Class 7 NCERT Solution Science Chapter 13 Motion and Time
NCERT Solutions Class 7 Science Chapter 13 Motion and Time detailed answers are given with the objective of helping students compare their answers with the example. NCERT solutions for Class 7 Science provide a strong foundation for every chapter. They ensure a smooth and easy knowledge of Revision notes for Class 7 Science. As suggested by the HRD ministry, they will perform a major role in JEE. Students can easily download these solutions and use them to prepare for upcoming exams and also go through the Question Papers for Class 7 Science to clarify all doubts
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