Explain the meaning of the terms rest and motion.
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A body is said to be at rest if it does not change its position with respect to its immediate surroundings.
A body is said to be in motion if it changes its position with respect to its immediate surroundings.
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Which quantity: mass or weight, does not change by change of place?
State which of the quantities, mass or weight is always directed vertically downwards.
Explain the meanings of:
(i) rectilinear motion
(ii) curvilinear motion
Give one example of each.
Explain oscillatory motion by giving one example.