Page 24 - Science Class 6 Times Publication

The motion of a body having both linear and rotatory motion at the
same time is called spiral motion.

A screw driver used to tighten a screw nail, a boy stepping up a
winding staircase, etc are example of spiral motion.

Use of screw driver Winding staircase Use of jack screw
Vibratory motion

When a string of a guitar is plucked, it vibrates. Similarly, when
prongs of a tuning fork are hit to a rubber pad, they vibrate. Here,
the motion of string or prongs is vibratory motion. Hence, the rapid
o
to and fro motion of an object is called vibratory motion or vibration.
ry fast oscill
During vibratory motion, the object has a very fast oscillatory motion.

Vibration of tuning fork Guitar
Guitar
Curvilinear motion

When direction of a moving body
changes continuously, its motion is
called curvilinear motion. Vehicles on
the curved road takes several turns, we
take several turns while moving on the
sloppy road, etc. These are the examples
of curvilinear motion.
Motion in a curved path

Times' Crucial Science and Environment 20 Book 6