Question

Observe the following motions and classify them as uniform motion,non-uniform motion and circular motion.

(1) Motion of a football player,

(2) Motion of a fan,

(3) Motion of an ant,

(4) Motion of a town bus,

(5) Motion of the moon,

(6) Motion of spectators in an auditorium,

(7) Motion of the arms of clock.

Answer 1

A body is said to be in uniform motion if it covers equal distances in equal intervals of time, and in non-uniform motion, if it covers unequal distances in equal intervals of time.

When a body is moving in a circular path about a fixed point, it is said to be in a circular motion.

i) A football player does not cover equal distances in equal time intervals, so it's a non-uniform motion.

ii) Fan rotates about the axis it is hanging with, so it's a circular motion. It is also an example of uniform motion as it moves with a constant speed at a particular time.

iii) Motion of an ant is a non-uniform motion.

iv) A town bus does not cover equal distances in equal time intervals, it is non-uniform motion.

v) Moon revolves around the earth and covers equal distances in equal time intervals, it is uniform and circular motion.

vi) Motion of spectators in an auditorium is an example of non-uniform motion.

vii) Motion of arms of a clock is circular and uniform motion.