Asked by Angela
                100 kg car moving at 22 m/s runs into a horizontal spring with spring constant 4200 N/m. How far does the car displace the spring before coming to a stop?
            
            
        Answers
                    Answered by
            Ms. Sue
            
    If you want expert help, you'll type the correct subject in the School Subject box.
    
                    Answered by
            drwls
            
    Using conservation of anergy is the quickest way to do this. 
It compresses the spring a distance X such that
(1/2) m V^2 = (1/2) k X^2
X = sqrt(m/k) * V = 3.4 m
It must be a very long spring.
    
It compresses the spring a distance X such that
(1/2) m V^2 = (1/2) k X^2
X = sqrt(m/k) * V = 3.4 m
It must be a very long spring.
                    Answered by
            Angela
            
    thank you!
    
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