Motion And Measurement Of Distances Worksheet

Objective Type Questions

1. Fill in the blanks:
   2 cm = …… mm
   
   
2. Match the following:
   
3. Analogy:
   Clock: object at rest:: Second’s hand of clock: …….. 
   
   
4. State whether the statement is true or false:
   For measuring the larger distances metre is a convenient unit.
   
   Multiple Choice Questions
   
   
5. Which of the following statement is INCORRECT?
   (a) 1 decametre < 1 decimetre
   (b) 1 millimetre < 1 centimetre
   (c) 1 hectometre < 1 kilometre
   (d) 1 decimetre > 1 centimetre
   
   
6. Which of the following is an example of oscillatory motion?
   (a) A spinning top
   (b) Motion of car on a road
   (c) Stone dropped from top of building
   (d) Pendulum of wall clock
   
   
7. The appropriate position of the eye while taking a reading should be ______ scale.
   (a) in front of the
   (b) To the left of
   (c) To the right of
   (d) Position of eye do not matter while taking a reading 
   
   
8. What do we need to measure the length of the curved path?
   
   (a) Only (i) 
   (b) (i) and (ii)
   (c) Only (ii)
   (d) (iii) and (iv) 
   
   
9. Amit needs to __________ the length, breadth and height of his wall to guess the number of tiles he will require to cover one wall completely.
   (a) Count
   (b) Estimate 
   (c) Weigh 
   (d) Measure 
   
   Subjective Questions
   
   

10. What precautions needs to be taken while measuring the length? 
    
    

11. While measuring the length of a pencil with a scale, one end is at 1.5 cm and the other end is at 8.4 cm. What is the length of the pencil in millimetres?
    
    
12. Why is it necessary to have standard units of measurement? What is the full form of SI unit?  
    
    
13. Arrange the following distances in their increasing magnitude: 
    2 kilometres, 7 centimetres, 0.5 metre, 1000 millimetres
    
    
14. Radhika measures a table surface with her mutthi and finds that the desk is 10 mutthi long. Ravi measures the same table surface using a 15 cm long scale and finds it 4 times the length of the scale. Find the length of Radhika’s mutthi? 
    
    
15. Ramesh and Sahil are sitting in moving car. Are they in state of motion or rest? 
    
    
16. Name three ancient ways of measuring length. State their disadvantages?
    
    
17. State the steps to determine the thickness of five rupee coin.
    
    Assertion-Reasoning Questions
    
    Below questions consist of two statements – Assertion (A) and Reason (R). Answer these questions selecting the appropriate option given below:
    
    

18. Assertion: The object which do not change their positions with the time are said to be at rest. 
    Reason: The object which change their positions with time are said to be in motion. 
    
    

19. Assertion: In 1790, the German created a standard unit of measurement called the metric system.
    Reason: For the sake of uniformity, scientists all over the world have accepted a set of standard units of measurement. 
    
    Case-Based Questions

20. In ancient times, small length measurements used were angul and mutthi. Egyptians accepted cubit as a unit of length. People used to measure cloth in yards. Even today we can see flower sellers using their forearm as a unit of length for garlands in many towns of India. Many such body parts continue to be in use as unit of length, when convenient. 
    (a) What is measurement? 
    (b) In the given paragraph, what does angul and mutthi means? 
    (c) How is “yard” of cloth measured? 
    (d) What is cubit?

Objective Type Questions

1. Fill in the blanks:
   2 cm = …… mm
   
   Solution: 2 cm = 20 mm
   
   
2. Match the following:
   
   Solution:
   
   
3. Analogy:
   Clock: object at rest:: Second’s hand of clock: ……..
   
   Solution: Clock: object at rest:: Second’s hand of clock: object in motion
   
   
4. State whether the statement is true or false:
   For measuring the larger distances metre is a convenient unit. 
   
   Solution: False.
   For measuring the larger distances kilometre is a convenient unit.
   
   Multiple Choice Questions
   
   
5. Which of the following statement is INCORRECT? 
   (a) 1 decametre < 1 decimetre
   (b) 1 millimetre < 1 centimetre 
   (c) 1 hectometre < 1 kilometre
   (d) 1 decimetre > 1 centimetre 
   
   Correct option: (a)1 decametre < 1 decimetre
   Solution: 1 decametre > 1 decimetre
   1 decametre = 100 decimetre
   
   
6. Which of the following is an example of oscillatory motion? 
   (a) A spinning top
   (b) Motion of car on a road
   (c) Stone dropped from top of building 
   (d) Pendulum of wall clock
   
   Correct option: (d) Pendulum of wall clock
   Solution: Among the given examples, simple pendulum executes the oscillatory motion. 
   
   
7. The appropriate position of the eye while taking a reading should be ______ scale. 
   (a) in front of the
   (b) To the left of 
   (c) To the right of
   (d) Position of eye do not matter while taking a reading 
   
   Correct option: (a) in front of the 
   Solution: The correct position of the eye while taking a reading is in front of the scale. 
   
   
8. What do we need to measure the length of the curved path?
   
   (a) Only (i)  
   (b) (i) and (ii) 
   (c) Only (ii) 
   (d) (iii) and (iv)
   
   Correct option: (b) (i) and (ii)
   Solution: Both the thread and scale are required to measure the length of curved path.
   
   
9. Amit needs to __________ the length, breadth and height of his wall to guess the number of tiles he will require to cover one wall completely. 
   (a) Count 
   (b) Estimate 
   (c) Weigh 
   (d) Measure
   Correct option: (d) measure
   Solution: So as to fix the tiles on one wall, Amit needs to measure the length, breadth and height of the wall.
   
   Subjective Questions
   
   
10. What precautions needs to be taken while measuring the length?
    
    Solution: Precautions to be taken while measuring length are: 
    (i) Ruler should be placed very close to the object along its length. 
    (ii) Eye should be kept exactly in front of the point of measurement.
    (iii) Avoid taking readings from zero mark of the ruler with broken edges. Instead take measurement from other fill mark of the scale.
    
    
11. While measuring the length of a pencil with a scale, one end is at 1.5 cm and the other end is at 8.4 cm. What is the length of the pencil in millimetres?
    
    Solution: Length of pencil = reading of second end – reading of first end 
    Length of pencil = 8.4 cm – 1.5 cm = 6.9 cm = 69 mm 
    
    
12. Why is it necessary to have standard units of measurement? What is the full form of SI unit?
    
    Solution: For the sake of uniformity in measurements it is necessary to have standard units of measurement. The full form of SI unit is International System of units.
    
    
13. Arrange the following distances in their increasing magnitude: 
    2 kilometres, 7 centimetres, 0.5 metre, 1000 millimetres
    
    Solution: 1000 millimetres = 100 centimetres = 1 metre 
    Thus, 1000 millimetres is greater than 0.5 metre and 7 centimetres. 
    Increasing order: 7 centimetres, 0.5 metre, 1000 millimetres, 2 kilometres 
    
    
14. Radhika measures a table surface with her mutthi and finds that the desk is 10 mutthi long. Ravi measures the same table surface using a 15 cm long scale and finds it 4 times the length of the scale. Find the length of Radhika’s mutthi?
    
    Solution: Length of table, as measured by Ravi = 15 x 4 = 60 cm. 
    The length of table measured by Radhika will be same i.e., 60 cm 
    Thus, length of table = 10 x length of Radhika’s mutthi
    Thus, length of Radhika’s mutthi = 60 cm/ 10 = 6 cm
    
    
15. Ramesh and Sahil are sitting in moving car. Are they in state of motion or rest?
    
    Solution: In reference to objects inside the car Ramesh and Sahil are in state of rest whereas with respect to objects and vehicles present outside the car Ramesh and Sahil are in state of motion. 
    
    
16. Name three ancient ways of measuring length. State their disadvantages?
    
    Solution: Arms-length, handspan and steps are the older methods of measuring length. As these methods differ from person to person, they were least accurate and non – uniform.
    
    
17. State the steps to determine the thickness of five rupee coin.
    
    Solution: 
    (i) Take ten 5-rupee coins and put them in a pile. 
    (ii) Measure the thickness of this pile using a scale (or ruler).
    (iii) Divide this thickness by 10 to get thickness of one 5-rupee coin. 
    
    Assertion-Reasoning Questions
    
    Below questions consist of two statements – Assertion (A) and Reason (R). Answer these questions selecting the appropriate option given below: 
    
    
    
18. Assertion: The object which do not change their positions with the time are said to be at rest. 
    Reason: The object which change their positions with time are said to be in motion.
    
    Correct option: (b) Both A and R are true, but R is not the correct explanation of A.
    Solution: Given assertion and reason statements are the definitions of the object in rest and motion respectively. 
    
    
19. Assertion: In 1790, the German created a standard unit of measurement called the metric system. 
    Reason: For the sake of uniformity, scientists all over the world have accepted a set of standard units of measurement.
    
    Correct option: (d) A is false, but R is true.
    Solution: Solution: In 1790, the French created a standard unit of measurement called the metric system.
    
    Case-Based Questions
    
    
20. In ancient times, small length measurements used were angul and mutthi. Egyptians accepted cubit as a unit of length. People used to measure cloth in yards. Even today we can see flower sellers using their forearm as a unit of length for garlands in many towns of India. Many such body parts continue to be in use as unit of length, when convenient. 
    
    (a) What is measurement? 
    (b) In the given paragraph, what does angul and mutthi means? 
    (c) How is “yard” of cloth measured? 
    (d) What is cubit?
    
    Solution:
    (a) Measurement is defined as the comparison of some unknown quantities with fixed quantity of same kind. 
    (b) Angul means finger and mutthi means fist.
    (c) The “yard” of cloth is measured by distance between the end of the outstretched arm and their chin. 
    (d) A cubit is length from the elbow to the fingertips.