A ship increases its speed from 20 m/s to 30 m/s in 200 m.
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A ship increases its speed from 20 m/s to 30 m/s in 200 m.

[From: ] [author: ] [Date: 11-09-14] [Hit: ]
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What is the acceleration and how much time is needed to travel 200 m?

(M = meters)

Thanks for any help!

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Accelaration is 10/8 m/s^2
Time is 8 Seconds

How:
V = Vi + A*T
=> 30 = 20 + A*T
=> A * T = 10

S = Si + Vi * T + 1/2 A * T * T
=> S = Si + Vi * T + 1/2 * (A * T) * T
=> 200 = 0 + 20T + 1/2 * 10 * T
=> 200 = 25T
=> T = 8

Hence A = 10/8

V = Final Velocity
Vi = Initial Velocity
T = Time Taken
A = Accelaration
S = Displacement

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I need an aswer quick. Can someone please answer my question . http://answers.yahoo.com/question/index?qid=20110913223021AA05ADb
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