physical science 9th

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You throw a ball to a friend that is 25 meters away (Distance). How fast was the ball traveling forward (velocity initial) when it left your hand if it takes 4 seconds (Time) to reach your friend? (Acceleration = 0)

Feb 24th, 2015

dX = Vi*t + 1/2a*t

25m = Vi*4s + 1/2(0 m/s^2)(4s)

25m = Vi*4s

6.25 m/s = Vi

Feb 24th, 2015

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