Question

explain whether the walls of a classroom are at rest or in motion .explain with reference to physics

Answer 1

They are at rest.....
As motion is defined as change in position with time .The walls are not changing their position.
As. suppose we are in our classroom at 7.00am At 7.10 am the walls will be there at 7.30am the walls will be their..
so we can't say that they are in motion i.e. they are at rest
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Answer 2

The walls of a classroom are at rest when observed from its surroundings. At the morning wherever we find them they appear at the same place even in the afternoon. They are not motile. As they don't move,they are at rest!
Hope it helps!