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Syllabus

Chapter 3

Motions of the Earth

Leap year

Our Earth takes 365 days and 6 hours to complete

one revolution. We usually count 365 days

in a year and 6 hours is

left . But this 6 hours in

every year becomes 24

hours . 24 hours means

One day.

So every four

year is a leap year.

A leap has 366 days instead of 365 days.

One day is added to Feb

ruary. So February has

29 days instead of 28days in aleap year.

In leap year there are 366

Days and February has

29 days. A leap year is

always divisible by 4.

2020 is a leap year because it is divisible by

4.

1) which is the motion that completes one round in a definite time period called ?

2)what is the type of motion of the move around the earth ?

3)what is the distance traversed by an object in one unit of time called?

1what is non uniform linear motion?

2) what it speed? write the formula for calculating speed