Question

In the question what does s-2 and s-1 mean?
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Answer 1

Answer:

They are the units of acceleration and speed

Units of speed:  m/s, also denoted as ms-1

Units of acceleration: m/$s^{2}$, also denoted as ms-2

Hope it helps!

Answer 2

Answer:

s-1 is second inverse

m/s is written as m s -¹ and it is the unit of Speed