RBSE Solutions for Class 6 Science Chapter 10 Motion and Measurement of Distances

Rajasthan Board RBSE Solutions for Class 6 Science Chapter 10 Motion and Measurement of Distances Textbook Exercise Questions and Answers.

RBSE Class 6 Science Solutions Chapter 10 Motion and Measurement of Distances

RBSE Class 6 Science Motion and Measurement of Distances InText Questions and Answers

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Question 1.  
Boojho is not sure why we say that the distance of the stone from your hand is same when we whirl it around. Can you help him understand this?
Answer:
Distance is defined as length between two points or places. When we whirl the stone, length between our hand and stone does not change. Hence, distance is same.

RBSE Class 6 Science Motion and Measurement of Distances Textbook Questions and Answers

Question 1. 
Give two examples each, of modes of transport used on land, water and air.
Answer:
(a) Land: Buses and cars
(b) Water: Ships and boats
(c) Air: Jet planes and aeroplanes.

Question 2. 
Fill in the blanks:
(i) One metre is ............................. cm.
(ii) Five kilometre is    ............................. metre.
(iii) Motion of a child on a swing is ............................. motion.
(iv) Motion of the needle of a swing machine is ............................. motion.
(v) Motion of wheel of a bicycle is .............................
Answer:
(i) 100 
(ii) 5000 
(iii) periodic motion 
(iv) periodic motion 
(v) circular motion.

Question 3. 
Why can a pace or footstep not be used as a standard unit of length? 
Answer:
A pace or footstep cannot be used as a standard unit of length because different people have different size of pace or foot.

Question 4. 
Arrange the following lengths in their increasing magnitude:
1 metre, 1 centimetre, 1 kilometre, 1 millimetre
Answer:
1 millimetre < 1 centimetre < 1 metre < 1 kilometre

Question 5. 
The height of a person is 1.65 metre. Express it into centimetre and millimetre.
Answer:
1 metre = 100 centimetre; therefore, 1.65 m = 165 cm
1 metre = 1000 millimetre; therefore, 1.65 m = 1650 mm

Question 6. 
The distance between Radha’s home and her school is 3250 metre. Express this distance into kilometre.
Answer:
1 metre = \(\frac{1}{1000}\) kilometre 
3250
3250 metre = \(\frac{3250}{1000}\) kilometre
3250 metre = 3.250 kilometre

Question 7. 
While measuring the length of a knitting needle, the reading of the scale of one end is 3 centimetre and at the other end is 33.1 centimetres. What is the length of the needle?
Answer:
The length will be 33.1 - 3 centimetres = 30.1 centimetre.

Question 8. 
Write the similarities and differences between the motion of a bicycle and a ceiling fan that has been switched on.
Answer:
Similarity: The wheel of the bicycle and blades of the ceiling fan have circular motion.
Difference: Bicycle moves forward and backward hence also shows a rectilinear motion whereas the fan does not show any such motion.

Question 9. 
Why would you not like to use a measuring tape made of elastic material like rubber to measure distance? What would be some of the problems you would meet in telling someone about a distance you measured with such a tape?
Answer:
We cannot use an elastic measuring tape to measure distance because reading of an elastic measuring tape may vary according to the force by which it is stretched. Measurement may also vary, if different people measure or even if measurement is taken by the same person with same elastic tape.

Question 10. 
Give two examples of periodic motion.
Answer:

• Oscillation of a pendulum
• Motion of planets around the Sun.