Given below are some examples of motion. State in each case. If the motion is one, two or three dimensions : (i) A flying bird in the sky(ii) A footballkicked by a playes (iii) Earth revolving around the sum (iv) The motion of the bob of a simple pendulum.

Explanation

(i) A flying bird in the sky is a three dimensional motion. (ii) A football kicked by a player is a two dimensional motion. (ii) Earth revolving around the sum is a two dimensional motion. (iv) The motion of the bob of simpke pendulum is one dimensional motion. Some of the characteristics of uniform motion are as follows :
(i) In uniform motion, the veocity of object neither depends on the chice of origin nor on the choice of time interval.
(iii) In uniform motion along a straight line, the magnitude of displacemnt of object in a given time is equal to the distance travelled.
(iv) In nuiform motion. no force is required to maintain the motion.