Tirt D. answered • 04/16/14
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Earth has 2 motion..rotation and revolution. When it spins on its own axis its called Rotation and when it moves around the sun its called revolution
Tirt D.
Google definition is quite clear ...With respect to time anything which change places ( other words move or displacement ) is called motion ..opposite of motion is REST ..
take an example of a car ..lets say at 10:00am it's standing at a particular spot and at 12:00PM ..if it is still there...it means with respect to clock ( time) it has not displaced itself ..so it is at rest but ..if it is moving away from that spot as time changes the car is supposed to be in motion ..all motion quantities like velocity, acceleration, displacement will have time as the denominator ..since all motions are calculated against time
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04/17/14
Prasenjeet S.
So object must have to change there position to be in motion ! if it is true whats about rotation of planet which rotate on its Axis without changing its place.. is this motion or not? if yes then How?
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04/17/14
Tirt D.
There r different types of motion ..translation, rotation, oscillation, etc etc ..u pick up a reference point and see whether it is changing position with respect to time or not ..
if u r in a treadmill and running and sweating and u r not moving a bit from where you are what do u call that ? :))
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04/17/14
Prasenjeet S.
04/16/14