please help me and it's my humble request to u my friends don't give wrong answers
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1) When any external force does not act on the body it is said to be in rest position.
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10) when an object does not change its position with respect to time
11) a car moving in a straight path and a boy running in straight direction
12)when an object does not change its position with respect to time is called rest and motion is its opposite
13) the first one is uniform circular motion and other is simple harmonic motion
14)yes, because it varies from person to person
15)periodic motion is repeated in equal intervals of time and non periodic is its opposite
16)it is because lack of standard unit can cause confusion and waste of time in converting one unit to another
17)1km 340m
18)2400m
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