Write one example for each of the following type of motion.

(i) Rectilinear

(ii) Circular

(iii) Periodic

(iv) Circular and periodic

Give two examples of periodic motion.

Write the similarities and differences between the motion of a bicycle and a ceiling fan that has been switched on.

Fill in the blanks:

i. One meter is ____ cm.

ii. Five kilometers is ____ m.

iii. Motion of a child on a swing is ___.

iv. Motion of the needle of a sewing machine is __.

v. Motion of wheel of a bicycle is ___.

Write one example for each of the following type of motion.

(i) Rectilinear

(ii) Circular

(iii) Periodic

(iv) Circular and periodic

Identify the different types of motion in the following word diagram given as Fig. 10.8.

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 ............

Match the events related to motion in Column I with the types of motions given in Column II.

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.

How are the motions of a wheel of a moving bicycle and a mark on the blade of a moving electric fan different? Explain.

Paheli moves on a straight road from point A to point C. She takes 20 minutes to cover a certain distance AB and 30 minutes to cover the rest of distance BC. She then turns back and takes 30 minutes to cover the distance CB and 20 minutes to cover the rest of the distance to her starting point. She makes 5 rounds on the road the same way. Paheli concludes that her motion is