The comprehensive approach in SCERT Class 6 Basic Science Textbook Solutions Chapter 8 Motion in Daily Life Important Questions ensure conceptual clarity.
Motion in Daily Life Extra Questions and Answers Class 6 Basic Science Chapter 8 Kerala Syllabus
Motion in Daily Life Class 6 Important Questions
Question 1.
A. conversation two children are given.
Ben: The people in a moving bus are not moving ,they just remain at the same position.
Ken: The people in the bus are moving as they are also moving with the bus. Who is right ? Why?
Answer:
Reference body is to be specified to explain the state of motion or rest of a body.
With respect to the bus and people in the bus, the co-passenger is not moving. When bus is the reference body ben is right.
When the ground is the reference body ,the people are considered to be changing position with respect to the ground. So with respect to ground the people in bus are moving. When ground is the reference body ken is right.
So we can say both are right .but it is very important that a reference body is to be correctly specified.
B. A person is riding a horse. Describe his motion with respect to horse and ground.
Answer:
With respect to horse .the person riding horse is at rest. With respect to ground the person is in motion.
C. All the objects on earth that are assumed to be at are also moving along with the earth. (Rest, motion)
Answer:
Rest
Question 2.
A. Complete the table by choosing state of rest/motion for each example. Context The reference object State of motion/ State of rest
| Context | The reference object | State of motion/ State of rest |
| (a) Child on a moving giant wheel | (i) child sitting near by | |
| (ii) A Person standing on the ground | ||
| (b) Person riding a horse | (i) The Horse | |
| (ii) The ground | ||
| (c) Earth in the solar system | (i) The Sun | |
| (ii) The moon | ||
| (d) A book on a table | (i) The Table | |
| (ii) The Sun |
Answer:
| Context | The reference object | State of motion/ State of rest |
| (a) Child on a moving giant wheel | (i) child sitting near by | (i) State of rest, |
| (ii) A Person standing on the ground | (ii) State of motion | |
| (b) Person riding a horse | (i) The Horse | (i) State of rest, |
| (ii) The ground | (ii) State of motion | |
| (c) Earth in the solar system | (i) The Sun | (i) State of motion, |
| (ii) The moon | (ii) State of motion | |
| (d) A book on a table | (i) The Table | (i) State of rest, |
| (ii) The Sun | (ii) State of motion |
B. What do you mean by a reference body.
Answer:
An object can be said to be in motion only in relation to another body or position. The body used for this purpose is called reference body.
C. …………… motion of earth causes day and night (Circular, rotational)
Answer:
Rotational
Question 3.
A. Classify the given examples as object in motion and at rest
i) A book on the table
ii) A fish swimming in the pond
iii) Truck moving on the road
iv) A scooter parked on roadside
Answer:
Objects at rest
i) A book on the table
iv) A scooter parked on roadside
Objects in motion
ii) A fish swimming in the pond
iii) Truck moving on the road
B. Complete the table
| Body in motion | Type of motion | Use |
| A lift | (a) | (b) |
| A swing | (c) | Entertainment |
| String of veena | Vibration | (d) |
| Wheels of flour mill | (e) | To rotate the grinding wheels |
| Hands of a clock | (f) | To know time |
Answer:
(a) Linear motion
(b) To go up and down
(c) Oscillation
(d) Pleasant music is produced
(e) Rotation
(f) Circular motion
Question 4.
Observe the following motions.
A. Which of them resemble the different motions of pencil when
(a) Sharpening a pencil with a sharpener.
(b) Draw a circle with a pencil fixed in a compass.
(c) Draw a straight line using a pencil and scale.
Answer:
A. (a) -(2); (b)-(1), (4), (6); (c) (3), (5)
B. What is the common feature of the motion in a), b) and c)
Answer:
In a)- Motion is about a fixed axis In
b) -Motion is in a circular path In
c) -Motion is along a straight line
Question 5.
Observe the picture
(a) What is the difference between the movement of giant wheel and the movement of the child on the wheel when it works?
Answer:
Movement of giant wheel – Rotation
Movement of child on the wheel – Circular motion
(b) How is vibration different from oscillation?
Explain with examples.
Answer:
Oscillation is the movement of an object to both sides about the equilibrium position. The motion of the pendulum of a clock is to both sides about its equilibrium position. This is an example of oscillation. But fast oscillations are called vibrations. When the tuning fork is hit with a rubber hammer the tongs begin to vibrate. This is an example for vibration.
Question 6.
Observe the picture.
A. What motion taken place in the picture marked where it is 1 and 2? Write down the characteristics of each motion.
Answer:
In 1 – It is circular motion, In 2-Oscillation
Circular motion – The motion along a circular path is circular motion.
Oscillation -It is the movement of an object to both sides about the equilibrium position.
B. Write any two examples for these types of motions.
Answer:
Circular motion examples
i) Swirling a stone tied to rope
ii) Toy train running along a circular path
Oscillation examples
i) Motion of swing
ii) Motion of a hanging lamp
Question 7.
The situations related to motion are given below. Observe them.
|
(A) Find out the motion that takes place in each situation.
Answer:
Motion of the blade when mixer operates-Circular motion
Motion of the leather membrane when drum is beaten – Vibration
Movement of the lift- Linear motion
Movement of the tip of the needle in the clock-Circular motion
(B) What is the difference between rotation and circular motion?
Answer:
Rotational motion is the movement of objects about their own axis.
Circular motion is the motion of objects in a circular path.
(C) Write two situations in which motion of air is identified.
Answer:
- Movement of leaves in air
- Blowing with hand fan
Question 8.
A. Classify the following motions as oscillation and vibration
i) Motion of a pendulum
ii) Motion of the strings in a guitar
iii) Motion of a swing
iv) Motion of the prongs of a tuning fork
v) Motion of the wiper
vi) Motion of the membrane of a drum
Answer:
| Oscillation | Vibration |
| i) Motion of a pendulum iii) Motion of a swinging v) Motion of the wiper |
ii) Motion of the strings in a guitar iv) Motion of the prongs of a tuning fork vi) Motion of the membrane of a drum |
B. Differentiate between oscillation and vibration
Answer:
Oscillation is the movement of an object to both sides about the equilibrium position Vibration is quick oscillation
C. What type of motion is seen in a
a) Seesaw
b) String of violin
Answer:
a) Oscillation
b) Vibration
Question 9.
Observe the picture
Some activities that take place while riding a bicycle are given below,
(i) Pedalling
(ii) Applying the brake
(iii) Turning the handle
A. How does the force affect the motion in each situation?
Answer:
(i) Pedalling – Increases speed
(iii) Applying the brake – stops movement
(iii) Turning the handle – changes the direction
B. The teacher said that the sound heard when the children put their ears to each other’s chest was the movement of the heart.
Write two other movements that occur in your body.
Answer:
Movement of eyeballs, Movement of arms
C. Which is the odd one in group?
i) A ball thrown against the wall bounces back.
ii) Increases the speed of the running bus.
iii) A vehicle moving forward reverses backward.
iv) Hits a bow led ball with the cricket bat
Answer:
Increase the speed of the running bus.
Question 10.
Observe the gears that Salim got when be opened the clock A.
A) Which gear rotates in the same direction of gear 1 ?
Answer:
Gear 3
B) Which gear is the fastest and which is the slowest?
Answer:
Gear 4 is the fastest. Gear 1 is the slowest
C) Gears helps to transfer the force applied in one part of a device to another part. Write two other arrangements for this type of transfer of force?
Answer:
Belt and chain
Question 11.
A. Match the following:
| Device | Movement |
| Flour Mill | Chain |
| Bicycle | Axle |
| Vehicles | Belt |
Answer:
| Device | Movement |
| Flour Mill | Belt |
| Bicycle | Chain |
| Vehicles | Axle |
B. What are gears ? What is it used for ?
Answer:
Gears form the inevitable parts for the functioning of vehicles and machinery. In a gear system, wheels of different sizes are usually used. These systems are used for increasing and decreasing speed.
C. Rotating a smaller wheel using a bigger wheel (i) _______ the speed and rotating a bigger w heel using a smaller wheel (ii) _______ the speed. Fill in the blanks by choosing suitable words from the box
(decreases, increases, remains the same)
Answer:
(i)-increases ,
(ii)- decreases
Question 12.
A. A man pulling a hand cart applies force on it in the following situations. What is the purpose in each case?
(i) When he starts pulling the hand cart.
(ii) When it goes on a down hill
Answer:
(i) To move the hand cart.
(ii) To decrease the speed of hand cart.
B. What are the changes force can bring about in the motion?
Answer:
Force can
- bring an object at rest to motion •bring a moving object to rest.
- change the speed of moving objects
- change the direction of moving objects
C. Examine the given statement and the reason for it.
Statement: When football is kicked with more force, the ball moves slower.
Reason: As force increases , the speed increases
By examining the statement and the reason, find out which of the following is correct.
(a) Statement and reason are correct
(b) Statement and reason are incorrect
(c) Statement is correct and reason is incorrect
(d) Statement is incorrect and reason is correct
Answer:
(d) Statement is incorrect and reason is correct
Question 13.
Observe the picture and answer the following.
(a) When the small lid is turned to the left, in which direction does the big lid turn? What happens when it is turned to the right?
Answer:
When the small lid is turned to the left, the big lid is turned to right. When the small lid is turned to the right, the big lid is turned to left.
(b) Does the big lid also complete one rotation when the small lid completes one?
Answer:
No. The big lid does not complete one rotation.
(c) How many times does the small lid rotate when the big lid is rotated once?
Answer:
When the big lid is rotated once, the small lid rotate more than once.
(d) In a bicycle gear is used to rotate the gear, (bigger, smaller)
Answer:
In a bicycle bigger gear is used to rotate the smaller gear.
Question 14.
A. Observe the arrangement of gears in the figure.
(a) When the first gear is rotated, which other gear would also rotate in the same direction?
(b) Which gear would be the slowest?
(c) Which gear would be the fastest?
Answer:
(a) 3rd gear rotate in the same direction
(b) 4th gear (big one) would be the slowest
(c) 1st gear (small one) would be the fastest
B. (a) Give an example to show that a force applied in one place be made available in another place to make movement possible
(b) The ball approaching a batsman is hit away from the ball. What is the effect of force here?
Answer:
(a) Bicycle -Force on pedal force makes the wheels turn,
(b) Force can change the direction of motion.