Asked by Mya
                You are driving through town at 12m/s when suddenly a ball rolls out aim front of you. You apply the brakes and begin decelerating at 4ms^2. How long does it take you to stop?
The answer I got is -3 is that possible!!!!??! I'm not sure what doing wrong.
            
        The answer I got is -3 is that possible!!!!??! I'm not sure what doing wrong.
Answers
                    Answered by
            bobpursley
            
    vf^2=vi^2 + 2ad  that will give you the distance.
vf=Vi+at where a=-4 solve for t, that will give you the time.
    
vf=Vi+at where a=-4 solve for t, that will give you the time.
                    Answered by
            Mya
            
    Why is it negative 4?  Is id because it's decelerating?
    
                    Answered by
            Damon
            
    Yes, negative acceleration = deacceleration
change in velocity is negative
    
change in velocity is negative
                    Answered by
            Mya
            
    Thank you!!!!!!!!
    
                    Answered by
            Damon
            
    You are welcome :)
    
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