UNIQUE STUDY POINT ← Class VI
Home›Class VI›Science›Ch 5

Class VI NCERT solutions Measurement of Length and Motion

Class VI Science 📘 NCERT Solutions Ch 5: Measurement of Length and Motion NCERT book: Curiosity
Updated 24 Feb 2026
Class VI Science • Curiosity

📏 Chapter 5: Measurement of Length and Motion

NCERT Solutions — Complete Question & Answer Guide

UNIQUE STUDY POINT BY SUMEET SAHU | uniquestudyonline.com

📌 Key Concepts

✦ SI unit of length: metre (m)

✦ Conversions: 1 km = 1000 m; 1 m = 100 cm; 1 cm = 10 mm

✦ Length is measured using scale, measuring tape, metre rod

✦ Motion = change in position of an object with time

✦ Types: Linear (straight line), Circular (circle), Oscillatory (to and fro)

✦ Motion is relative — depends on the reference point

✦ Correct measurement: eye should be perpendicular to the scale (no parallax error)

📝 Let Us Enhance Our Learning

Q1 Fill in the blanks.
ANSWER
StatementAnswer
(i) The SI unit of length is ______.metre (m)
(ii) 1 km = ______ m1000
(iii) 1 m = ______ cm100
(iv) 1 cm = ______ mm10
(v) The motion of a swing is ______ motion.oscillatory
Q2 What are the different types of motion? Give examples.
ANSWER
TypeDescriptionExamples
Linear (Rectilinear)Motion in a straight lineCar on a road, ball rolling on floor
CircularMotion along a circular pathHands of a clock, Earth around Sun
OscillatoryTo-and-fro (back and forth) motionSwing, pendulum, vibrating string
Q3 Convert: (i) 5 km to m (ii) 200 cm to m (iii) 3.5 m to cm (iv) 7000 m to km
ANSWER

(i) 5 km = 5 × 1000 = 5000 m

(ii) 200 cm = 200 ÷ 100 = 2 m

(iii) 3.5 m = 3.5 × 100 = 350 cm

(iv) 7000 m = 7000 ÷ 1000 = 7 km

Q4 What is the correct way to measure length using a ruler?
ANSWER
  • Place the ruler along the object, starting from the zero mark.
  • Keep your eye directly above the point being measured (perpendicular).
  • Avoid looking from an angle — this causes parallax error.
  • Note the reading where the object ends.
Q5 Can an object have more than one type of motion at the same time? Give example.
ANSWER

Yes! An object can have more than one type of motion simultaneously.

Example: A spinning top — it rotates (circular motion) and also moves on the surface (linear). A ball rolling on the ground has both linear and circular motion. Earth rotates on its axis (circular) and revolves around the Sun (circular).

Q6 What is meant by "motion is relative"?
ANSWER

Motion depends on the reference point (observer's position). A person sitting in a moving bus is at rest with respect to the bus, but in motion with respect to a tree outside. So the same object can be in motion AND at rest depending on the reference point.

Q7 Identify the type of motion: (i) Hands of a clock (ii) Pendulum of a wall clock (iii) A car on a straight road (iv) A spinning top
ANSWER

(i) Hands of a clock — Circular motion

(ii) Pendulum — Oscillatory motion

(iii) Car on straight road — Linear motion

(iv) Spinning top — Circular + Linear motion

UNIQUE STUDY POINT BY SUMEET SAHU

Amitesh Nagar, Indore, Madhya Pradesh | uniquestudyonline.com

More study material: Class VI Science

Sumeet Sahu (14 years of teaching experience), Unique Study Point, Amitesh Nagar, Indore. Free NCERT/CBSE study material for Class VI to X.