Class 7 Science Chapter 7 MCQ Motion and Time
MCQ on Motion and Time Class 7
I. Multiple Choice Questions
Question 1.
Change in position of an object with respect to time is known as
A) speed
B) distance
C) motion
D) time
Answer:
C) motion
Question 2.
When a body spins, the body is in
A) revolutionary motion
B) rectilinear motion
C) rotatory motion
D) periodic motion.
Answer:
C) rotatory motion
Question 3.
Motion of a bus on a straight path is an example of
A) periodic motion
B) translatory motion
C) rotatory motion
D) oscillatory motion
Answer:
B) translatory motion
Question 4.
Which of the following is true?
i) Speed =\(\frac{\text { Distance }}{\text { Time }}\)
ii) Distance =\(\frac{\text { Speed }}{\text { Time }}\)
iii) Time =\(\frac{\text { Distance }}{\text { Speed }}\)
iv) Time Speed = Distance
A) (i), (ii), (iii) and (iv)
B) (i), (iii), and (iv)
C) (ii) and (iii)
D) (iii) and (iv)
Answer:
B) (i), (iii), and (iv)
Question 5.
When a body covers equal distance in equal interval of time, then it is said to be in
A) average is peed
B) speed
C) uniform motion
D) non-uniform motion
Answer:
C) uniform motion
Question 6.
Which of the following is not the unit of speed ?
A) Miles per hour
B) Metre per second
C) Pounds per square inch
D) Kilometre per hour
Answer:
C) Pounds per square inch
Question 7.
The speed of a moving object means
A) how far it goes in a certain time
B) how long it goes on moving
C) how far it goes
D) none of these
Answer:
A) how far it goes in a certain time
Question 8.
Which of the following is different among these?
A) Quartz clock
B) Water clock
C) Sundial
D) Sand clock
Answer:
A) Quartz clock
Question 9.
Identlify the correct one.
A) 50 kms
B) 50 km
C) 50 km
D) 50 Km
Answer:
B) 50 km
Question 10.
The gap between two consecutive noons is ……………….
A) an hour
B) a second
C) a night
D) a solar day
Answer:
D) a solar day
Question 11.
A car is moving with an average speed of 50km/h. The time taken by the car to complete its journey of 300k m is……..
A) 6 h
B) 10 h
C) 5 h
D) 15 h
Answer:
A) 6 h
Question 12.
A speedometer measures the speed in ……………….
A) km/h
B) m/h
C) m/s
D) cm/s
Answer:
A) km/h
Question 13.
Which of the following is not matched correctly?
A) Anemometer: Wind speed
B) Speedometer: Speed
C) Odometer : Odour
D) Stopwatch : Time
Answer:
C) Odometer : Odour
Question 14.
When a body is moving with a constant speed, the distance-time graph will be a ……………….
A) curved line
B) parabola
C) straight line
D) none of these
Answer:
C) straight line
Question 15.
The given graph shows that the object is ……………….
A) in non-uniform motion
B) in uniform motion
C) at rest
D) in an oscillatory motion.
Answer:
C) at rest
Question 16.
What part of a second is called a nanosecond?
A) One billionth
B) One hundredth
C) One thousandth
D) One millionth
Answer:
A) One billionth
Question 17.
A train leaves a station X at 5: 00 pm and reaches to another station Y at midnight. Its speed is 90 km/h? What is the distance between X and Y ?
A) 480 km
B) 630 km
C) 800 km
D) 830 km
Answer:
A) 480 km
Question 18.
On Monday, Barnali spent 20 minutes on her science homework, 38 minutes on english homework and 25 minutes on mathematics homework. How much time did she spend on her homework?
i) 83 minutes
ii) 1 hour 23 minutes
iii) 4980 seconds
iv) 4990 seconds
A) (i), (ii) and (iii)
B) (i), (ii) and (iv)
C) (i) and (ii)
D) None of these
Answer:
B) (i), (ii) and (iv)
Question 19.
The speed of a body
A) remains constant irrespective of the distance
B) becomes zero with the increase in distance
C) decreases with the increase in the ratio of distance to time
D) increases with the increase in the ratio of distance to time.
Answer:
D) increases with the increase in the ratio of distance to time.
Question 20.
How many minutes are there in 6.5 hours?
A) 390
B) 590
C) 490
D) 290
Answer:
A) 390
Question 21.
If a simple pendulum completes 20 oscillations in 40 seconds, then the time taken by one complete oscillation is ……………….
A) 0.2 second
B) 0.5 second
C) 2 seconds
D) 1 second.
Answer:
C) 2 seconds
Question 22.
A car with non-uniform motion travels 200 km in 5 hours. What can be said about the speed of the car?
A) lts speed is 40km/h for most of the journey.
B) Its average speed is 40km/ hduring the journey.
C) Its speed is constant at 40 km/h during the journey.
D) Its speed is 40 km/h at the beginning and at the end of the journey and varies in between.
Answer:
B) Its average speed is 40 km/h during the journey.
Question 23.
Look at the following graph carefully and find the velocity of the moving body.
A) 0 m/s
B) 1 m/s
C) 2 m/s
D) 3 m/s
Answer:
B) 1 m/s
Question 24.
A body goes 20 km East, then 10 km North, then 50 km West and then 30 km East. Find the displacement of the body from the initial position.
A) 0 km
B) 20 km
C) 10 km
D) 110 km
Answer:
C) 10 km
Question 25.
Train A travels with a speed of 90km/h from Hyderabad to Bangalore. Train B travels with a speed of 90km/h from Bangalore to Hyderabad. Which of the following statements is true?
A) Both trains are travelling with the same speed and same velocity.
B) Both trains have the same velocity.
C) Trains A and B have the same speed but different velocities.
D) Trains A and B have the same velocity but different speeds.
Answer:
C) Trains A and B have the same speed but different velocities.
Question 26.
According to the following graph, what happens to the distance covered by the body from 0-10 minutes?
A) It goes on increasing.
B) It goes on decreasing.
C) It first increases and then decreases.
D) It first decreases and then increases.
Answer:
A) It goes on increasing.
II. Fill in the blanks
1. An instrument used to measure the speed of a vehicle is …………
Answer: speedometer
2. An odometer measures the ………… moved by a vehicle.
Answer: distance
3. The basic unit of speed is …………
Answer: m/s
4. The ages of stars and planets are often expressed in ………… of years.
Answer: billions
5. The distance-time graph for the motion of an object moving with a constant speed is a ………..
Answer: straight line
6. Motion of objects can be represented in pictorial form by …………
Answer: distance – time graphs
7. ………… clocks are the most accurate.
Answer: Atomic
8. Vibrations of a ………… crystal is used in the electronic watches to measure. time.
Answer: quartz
9. Velocity is defined as ………… per unit time.
Answer: displacement
10. If the distance between the object and some reference point is not changing with time, then the object is said to be at …………
Answer: rest
III. True Or False
1. Motion of Mars around the Sun is an example of periodic motion.
Answer: True
2. A car moving at a constant speed shows periodic motion.
Answer: False
3. The vehicle having higher speed than the other is said to be faster.
Answer: True
4. Speed is the total distance covered divided by the total time.
Answer: True
5. A higher speed indicates that a given distance is covered in a shorter time.
Answer: True
6. If the speed of an object moving along a straight line keeps changing, its motion is said to be uniform.
Answer: False
7. The resting position of the bob of a pendulum is known as mean position
Answer: True
8. A non-uniform motion appears as a curved line on a distance-time graph
Answer: True
9. International standard time follows the Greenwich Mean Time
Answer: True
10. A sundial works by casting a shadow in different positions at different times of a day.
Answer: False
11. The direction of motion and speed of a body in non-uniform motion do not change.
Answer: True
12. Time period of a simple pendulum depends upon the mass of the bob.
Answer: False
IV. Matching
| Column – I | Column – II |
| A) Swinging back and forth | i) Quartz |
| B) A crystal used in electronic watches | ii) Time period |
| C) Movement of an object with variable speed | iii) Non-uniform motion |
| D) Time taken by a pendulum to complete one oscillation | iv) 1/100 millennium |
| E) One decade | v) Oscillation |
Answer:
| Column – I | Column – II |
| A) Swinging back and forth | v) Oscillation |
| B) A crystal used in electronic watches | i) Quartz |
| C) Movement of an object with variable speed | iii) Non-uniform motion |
| D) Time taken by a pendulum to complete one oscillation | iii) Time period |
| E) One decade | iv) 1/100 millennium |