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    babi_gurl's Avatar
    babi_gurl Posts: 30, Reputation: 2
    Junior Member
     
    #1

    Feb 25, 2007, 04:01 AM
    Constant acceleration
    Hey help me with this question :o
    A body moving with constant accelertion and starting from rest covers 9m in the eighth second. Find the acceleration

    Thankss:)
    Capuchin's Avatar
    Capuchin Posts: 5,255, Reputation: 656
    Uber Member
     
    #2

    Feb 25, 2007, 04:05 AM
    Hi babi_gurl

    You need to use the suvat equation

    You can rearrange this for a and then put in your values for u, t and s.

    Let me know if you get stuck!
    Capuchin's Avatar
    Capuchin Posts: 5,255, Reputation: 656
    Uber Member
     
    #3

    Feb 25, 2007, 04:15 AM
    From PM:

    Quote Originally Posted by babi_gurl
    hey thanks for replying to my questions =D and yeah can u check if i did it correctly hehe
    u=0m/s s=9m t=8s
    s=ut+1/2at^2
    so to make a the subject,
    a= (s-ut) divide by 1/2t^2
    a= (9-0x8)/0.5x8^2
    a=9/32
    so hence, a= 0.28ms^-2

    thanks soo much =D
    Yes that looks right to me :)

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