3. Motion is change of location or position of an
object with respect to time.
Change in motion is the result of an applied
force.
Motion is typically described in terms of
velocity also seen as speed, acceleration,
displacement, and time.
WHAT IS MOTION?
4. The motion of an object is said to be translatory if the
position of the object is changing with respect to a
fixed point or object. All the particles of a body
performing translatory motion move in the same
direction traversing parallel paths.
Rectilinear Motion: In rectilinear motion the body
moves in a straight line.
Example: Drawer of a table.
Curvilinear Motion: In curvilinear motion the object
moves along a curved
line.
Example: Cable car moves in a curve.
TRANSLATORY MOTION
5. Rotation of a body or body part about a fixed
point or line in space (the axis of rotation) so
that all parts of the body travel through the
same angle, in the same direction, in the same
time. The axis of rotation maybe internal or
external. But it may not pass through itself.
Example: Connected rotating gears.
The washing machine’s spin dryer.
ROTATORY MOTION
6. Oscillatory motion is that in which a body moves to
and fro about its mean position. A back-and-forth
recurring movement.
Example: That swing in the children's park, when it is
pushed by you it starts swinging. It has a damped
motion due to friction of moving arts and air.
Vibratory Motion
If the oscillatory motion is very fast, then it is called
vibratory motion
Example: The moving of the wings of bees.
OSCILLATORY MOTION
7. A vibrating object moves over the same path over the course
of time. Its motion repeats itself over and over again. If it
were not for damping, the vibrations would endure forever or
at least until someone catches the mass and brings it to rest.
Example: 1. rocking chair
2.a bouncing ball
PERIODIC MOTION
