Answer:


Explanation:

Required
The units of A and B
From the question, we understand that:

This implies that each of
and
will have the same unit as 
So, we have:


The unit of t is (s); So, the expression becomes

Divide both sides by 


<span>The support force is 15 N. The net force on the book is zero.</span>
Water? The sun. I DUNNO I FEEL BAD :(
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