Question

A body is moving with a uniform acceleration of 2 m/s2. What does it mean?

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Answer 1

it means the velocity is changing.

the rate of change of velocity is acceleration

so it means the body is accelerated at 2m/s^2

Answer 2

It means that the body is moving, and getting faster and faster. At any time, it's moving 2 m/s faster than it was moving 1 second earlier.