Answer to Question #18427 in Mechanics | Relativity for Katherine
T = 5.21[m/s]/4.5[m/s²] ≈ 1.158 seconds.
That time the ball travels
D = 5.21[m/s]*1.158[s] - 4.5[m/s²]*(1.158[s])²/2 ≈ 3 metres.
So, the ball moves about 1.158 seconds in the positive direction and the travelled distance is about 3 metres.
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