Class 9th chapter 8 motion important note
Answers
Answer:
•What is motion?
=The movement of an object is called motion..
•What is time ?
= The moment (or duration) in which things occur is called time ...
•How many motion?
= There are four types of motion are:-
1. Rectilinear motion
2. circular motion
3. Rotational motion
4.periodic motion
• Define rectilinear motion?
= Motion in a straight line is called rectilinear motion..
• define circular motion?
= When an object moves along a circular path it's is called circular motion..
• Define Rotational motion?
= When an object turns (or spins) about a fixed axis it will is called rotational motion .
• Define periodic motion?
= The motion in which repeat itself after regular intervals of this time it is called periodic motion..
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=The knowledge of time is essential for caring on our daily life activities for example our school start at a particular time we use our best watch to know the time so that we made it the school on time similarly we need to know time to catch a bus or train on aeroplane for making on journey we also have to know that I need to listen to a particular radio program or to watch favourite television programe. we measure time with the help of clocks and watches......