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13. Motion and Time-Exercise Science Class 7 In English
Last Updated : 06 March 2026
Explore science Solutions for Class 7 Chapter 13. Motion and Time Topic Exercise in English medium.
13. Motion and Time-Exercise Science Class 7 In English
Last Updated : 06 March 2026
13. Motion and Time-Exercise Science Class 7 In English
13. Motion and Time
Exercise
Exercise :
Que1. 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:
straight line motion : (ii), (vi)
circular motion : (iii), (iv)
oscillary motion : (i), (v)
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.
Answer :
(i) True
(ii) False
(iii) True
(iv) False
(v) False
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.
8. Which of the following relations is correct?
(i) Speed = Distance Time
(ii) Speed = Distance Time
(iii) Speed = Time Distance
(iv) Speed = 1 Distance
9. The basic unit of speed is:
(i) km/min
(ii) m/min
(iii) km/h
(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
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.
12. Fig. 13.15 shows the distance-ti
me graph for the motion of two vehicles A and B. Which one of them is moving faster? (i) (ii) Fig. 13.15 Fig. 13.15 Distance-time graph for the motion of two cars
13. Which of the following distance-time graphs shows a truck moving with speed which is not constant?
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NCERT Solutions for Class 7 science Chapter 13. Motion and Time Topic Exercise
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13. Motion and Time-Exercise Science Class 7 In English
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