The objects which repeats its motion after some time is called _________ .

The correct answer is periodic motion.

Key Points

• A motion that repeats itself after a set amount of time is called periodic motion.
• When a body repeatedly moves along a certain path over a predetermined amount of time, it is said to be exhibiting periodic motion.
• The term "time period" refers to the interval of time after which the body's motion is repeated.
• Examples of periodic motions:
  • earth’s rotation around the sun
  • motions of the hands of a clock
• When a body moves in a non-periodic manner, it doesn't repeat the same motion after a set amount of time.
  • A bouncing ball, for instance, moves in a non-periodic manner.

Additional Information

• Rectilinear motion or linear motion is a type of motion that only moves in one direction or on one axis.
  • Every parameter connected to motion is pointed in the same direction.
  • Consequently, the motion is sometimes referred to as one-dimensional motion.
  • Examples:
    • soldiers walking on the ground or marching during the event.
    • arrow fired by an archer
    • a car moving on a road
    • a person jogging in park
• ​An object moving while rotating in a circle is referred to as being in circular motion.
  • There are two types of circular motion: uniform and non-uniform.
  • The angular rate of rotation and speed will remain constant in uniform circular motion, whereas the rate of rotation will fluctuate in non-uniform motion.
  • Common examples of circular motion:
    • rotating ceiling fan
    • moving car’s wheel
    • blades of windmill
    • Merry-Go-Round
• When the object rotates for half circle and comes back, this is called semi-circular motion.