Question

0.1 Answer the following questions:-
(A) Give two examples of each:
(1) Periodic motion.
(2) Circular motion.
(3) Rectilinear motion.
(4) non- luminous natural body.​

Answer 1

Answer:

1) revolution of earth around sun,rotation of earth on its axis.

2)moving fan , a boy moving in circular path

3)car moving in straight road , a fruit falling from tree

4)earth ,mars .

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Answer 2

Answer:

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Explanation:

( A )

( 1 ) EXAMPLES OF PERIODIC MOTION- Motion of a pendulum  , Motion of a swing  , Motion of Earth round the Sun  , Motion of a rocking chair.

( 2 ) EXAMPLES OF CIRCULAR MOTION-  Motion of a wheel ,  A stone tied to a string , Artificial satellite orbiting earth ,  Turning of a car around a curve.

( 3 ) EXAMPLES OF RECTILINEAR MOTION-  People riding an elevator are in rectilinear motion, along with the elevator, within a building  , Any metal object in free fall, which is under the influence of gravitational forces is rectilinear motion  , Hot water that falls into a tea cup from a vending machine is in rectilinear motion  , Athletes running the 100-meter dash along the track are in rectilinear motion.

( 4 ) EXAMPLE OF NON-LUMINOUS NATURAL BODY-   the earth  , moon  , a piece of cloth  , coal.