Motion and Time Class 7 MCQs Questions with Answers
I. Choose the correct option.
Question 1.
The formula for distance is
(a) distance =
(b) distance =
(c) distance =
(d) distance = speed × time
Answer
Answer: (b) Sun
Question 2.
The distance travelled by the vehicles is recorded by
(a) monometer
(b) odometer
(c) speedometer
(d) motometer
Answer
Answer: (b) Sun
Question 3.
A bus travels 54 km in 90 minutes. The speed of the bus is
(a) 0.6 m/s
(b) 10 m/s
(c) 5.4 m/s
(d) 3.6 m/s
Answer
Answer: (b) Sun
Question 4.
The clocks and watches which are used for measuring time are based on
(a) rectilinear motion
(b) circular motion
(c) periodic motion
(d) rotational motion
Answer
Answer: (b) Sun
Question 5.
The device which is used for measuring time intervals in sports activities is called
(a) wrist watch
(b) stop watch
(c) stop clock
(d) quartz watch
Answer
Answer: (b) Sun
Question 6.
If the speed of an object along a straight line keeps changing, its motion is said to be
(a) uniform motion
(b) non-uniform motion
(c) linear motion
(d) none of these
Answer
Answer: (b) Sun
Question 7.
The most well known periodic motion is that of
(a) sundial
(b) stop watch
(c) simple pendulum
(d) sand clock
Answer
Answer: (b) Sun
Question 8.
Which of the following is based on the study of the shadow cast by the sun?
(a) Simple pendulum
(b) Atomic clock
(c) Sun dial
(d) Quartz clock
Answer
Answer: (b) Sun
Question 9.
The most appropriate unit for expressing the speed of a space rocket is
(a) m/s
(b) km/s
(c) km/h
(d) km/min
Answer
Answer: (b) Sun
Question 10.
Swami walks to his school which is at a distance of 4 km from his home in 30 minutes. On reaching he finds that the school is closed and comes back in his friend’s vehicle to home in 10 minutes. His average speed in km/h is
(a) 8 km/h
(b) 24 km/h
(c) 16 km/h
(d) 20 km/h
Answer
Answer: (b) Sun
II. Fill in the Blanks
Question 1.
The time taken by the pendulum to complete one oscillation is called its ……………..
Answer
Answer: time period
Question 2.
…………….. is the SI unit of time.
Answer
Answer: Second
Question 3.
The distance moved by an object in a unit time is called its ……………..
Answer
Answer: speed
Question 4.
Speed of the vehicle is shown by the instrument …………….. fitted on the vehicle.
Answer
Answer: speedometer
Question 5.
Distance time-graph representing a non-uniform motion of an object is of …………….. shape.
Answer
Answer: any
Question 6.
The distance-time graph for the motion of an object moving with a constant speed is a ……………..
Answer
Answer: straight line
Question 7.
SI unit of speed is ……………..
Answer
Answer: m/s
Question 8.
Motion of objects can be presented in a pictorial form by their …………….. graph.
Answer
Answer: distance-time
Question 9.
If an object covers 4 km in 4 minutes its speed is …………….. m/s and …………….. km/h.
Answer
Answer: 16.6; 60
Question 10.
In a simple pendulum, the metallic ball suspended by thread is called its ……………..
Answer
Answer: bob
III. True or False
Question 1.
Each and every object in this universe moves with a constant speed.
Answer
Answer: False
Question 2.
The motion of a spinning top is rotational motion.
Answer
Answer: True
Question 3.
The motion of earth around the sun is called rectilinear motion.
Answer
Answer: False
Question 4.
The smallest time interval which can be measured with commonly available clocks and watches is one second.
Answer
Answer: True
Question 5.
A sundial measures time by the position of the shadow cast by the sun.
Answer
Answer: True
Question 6.
Vehicles which covers more distance in small interval of time have slow speed.
Answer
Answer: False
Question 7.
Periodic motion is used to measure time.
Answer
Answer: True
Question 8.
The symbols of all units are written in singular.
Answer
Answer: True
Question 9.
All clocks make use of some periodic motion.
Answer
Answer: True
Question 10.
The basic unit of speed is km/min.
Answer
Answer: False
IV. Match the Following
| Column I | Column II |
| 1. Delhi | (a) Shadow cast by sun |
| 2. Sundial | (b) Measuring distance |
| 3. Quartz clock | (c) m/s |
| 4. Simple pendulum | (d) Motion |
| 5. Circular motion | (e) Used for measuring speed |
| 6. Odometer | (f) Jantar Mantar |
| 7. Soldiers in a march past | (g) Linear motion |
| 8. Unit of speed | (h) Use electronic circuit |
| 9. Speedometer | (i) Earth |
| 10. Change in position of body with respect to time | (j) Periodic motion |
Answer
Answer:
| Column I | Column II |
| 1. Delhi | (f) Jantar Mantar |
| 2. Sundial | (a) Shadow cast by sun |
| 3. Quartz clock | (h) Use electronic circuit |
| 4. Simple pendulum | (j) Periodic motion |
| 5. Circular motion | (i) Earth |
| 6. Odometer | (b) Measuring distance |
| 7. Soldiers in a march past | (g) Linear motion |
| 8. Unit of speed | (c) m/s |
| 9. Speedometer | (e) Used for measuring speed |
| 10. Change in position of body with respect to time | (d) Motion |
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