Page 23 - Science Class 6 Times Publication

Activity 2.1

To show oscillatory motion
Materials required: a stone, a thread, etc.

Procedure
i. Take a stone and tie it to one end of a thread.

ii. Fix another end of the thread to a stand.
iii. Gently pull the stone. Then release it. What happens?

Observation: The stone moves forward and backward periodically.

Conclusion: The motion of the stone is oscillatory motion.

Random motion

When an object moves in any direction without showing a particular
motion, its motion is random motiom. For instance, movement of
football player in the ground, movement of smoke and dust particles
in air, etc.

Random motion of a football Random motion of a ball Random motion of a butter y

Spiral motion

When bicycle runs, the wheel of the bicycle rotates about its axis
as well as in a straight line on the road at the same time. Thus,
the wheel has both rotatory and linear motion at the same time.

Times' Crucial Science and Environment 19 Book 6