Measurement of Length and Motion — Practice

Q1. What is the SI unit of length and its symbol?

• A. centimetre, cm
• B. metre, m
• C. kilometre, km
• D. millimetre, mm

Q2. One metre is divided into how many equal divisions, each called a centimetre?

• A. 10
• B. 50
• C. 100
• D. 1000

Q3. 1 kilometre is equal to how many metres?

• A. 10 metres
• B. 100 metres
• C. 1000 metres
• D. 10000 metres

Q4. 1 centimetre is equal to how many millimetres?

• A. 1 mm
• B. 10 mm
• C. 100 mm
• D. 1000 mm

Q5. Which of the following is NOT a standard unit of measuring length?

• A. millimetre
• B. centimetre
• C. kilometre
• D. handspan

Q6. Deepa's mother asks the tailor to increase the length of her uniform by char angula. What does char angula mean?

• A. Two metres
• B. Four fingers' width
• C. One handspan
• D. Half a foot

Q7. Deepa and her friends measure the same classroom table with their handspans (balisht). They get different numbers of handspans because

• A. The length of the table is changing
• B. Their handspans are of different sizes
• C. They are using the same hand
• D. Only one of them counted correctly

Q8. The full form of SI in 'SI units' is

• A. Standard Indian
• B. Simple International
• C. International System of Units
• D. Scientific Instrument

Q9. When the distance of an object is stated with respect to a fixed object or point, that point is called the

• A. Reference point
• B. Centre point
• C. Origin point
• D. Position point

Q10. An object is said to be in motion if

• A. It is heavy
• B. Its position changes with respect to a reference point with time
• C. It is made of metal
• D. Its colour changes with time

Q11. When an object moves along a straight line, its motion is called

• A. Circular motion
• B. Oscillatory motion
• C. Linear motion
• D. Periodic motion

Q12. A child sitting on a merry-go-round moves along a circular path. This kind of motion is called

• A. Linear motion
• B. Circular motion
• C. Oscillatory motion
• D. Random motion

Q13. A child on a swing moves to and fro about a fixed position. Her motion is an example of

• A. Linear motion
• B. Circular motion
• C. Oscillatory motion
• D. Translational motion

Q14. What is the correct way to place a 15-cm scale to measure the length of a pencil?

• A. Hold the scale a few centimetres above the pencil
• B. Place the scale in contact with the pencil along its length
• C. Place the scale perpendicular to the pencil
• D. Bend the scale around the pencil

Q15. Ravi wants to measure the length of a curved line drawn on his notebook. Which method does the chapter suggest?

• A. Use a 15-cm scale directly along the curve
• B. Estimate it by eye
• C. Place a thread along the curve, straighten it, then measure with a metre scale
• D. Count the divisions of the page