MOTION AND MEASUREMENT
REVISION
1. Correct the following.
(i) The motion of a swing is an example of rectilinear motion.
(ii) 1m = 1000 cm
2. Fill in the blanks
(i) Motion of an object or a part of it
around a fixed point is
known as ................ motion.
(ii) A body repeating its motion after certain interval of time
is in . ......... motion.
(iii) In rectilinear motion, object moves........... a . .......... line.
(iv) SI unit of length is . ..........
3. Write one example for each of the following type of motion.
(i) Rectilinear
(ii) Circular
(iii) Periodic
(iv) Circular and periodic
4. Four children measure the length of a table which was about
2 m. Each of them used different ways to measure it.
(i) Sam measured it with a half metre long thread.
(ii) Gurmeet measured it with a 15 cm scale from her
geometry box.
(iii) Reena measured it using her hand span.
(iv) Salim measured it using a 5 m long measuring tape.
Which one of them would get the most accurate length? Give
reason for your answer.
5. Match the events related to motion in Column I with the types
of motions given in Column II.
COLUMN I COLUMN II
(a) A moving wheel of a (i) Circular motion
sewing machine
(b) Movement of the hour hand in a clock (ii) Rotational motion
(c) A moving swing (iii) Periodic motion
6. Boojho was riding in his bicycle along a straight road. He
classified the motion of various parts of the bicycle as (i)
rectilinear motion,
(ii) circular motion and
(iii) both rectilinear
as well as circular motion.
Can you list one part of the bicycle
for each type of motion? Support your answer with reason.
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