(I) A car slows down from 28 ms to rest in a distance of 88 m. What was its acceleration, assumed constant?

The  value is  

Explanation:

From the question we are told that  

       The  initial speed is   at a distance of  

        The  final speed is      at a distance of  

Generally  from the  kinematic equation we have that

=>  

=>  

=>  

The negative sign shows that it is decelerating

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the current is 0.6

voltage ÷ resistance = current

so 12 ÷ 20 = 0.6