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Vota 4,2 / 5

Alessandra e Silvia pattinano una accanto all' altra, procedendo entrambe con la stessa velocità . A un certo punto Alessandra decide di accelerare e supera Silvia di 12 m in 2s. Qual è l' accelerazione che permette ad Alessandra di effettuare un tale sorpasso?

SVOLGIMENTO:

[math]s=1/2 \cdot a \cdot (t^2)[/math]

[math]12m=1/2 \cdot a \cdot (t^2)[/math]

[math]a= 24m/ t^2= 24m/ 4s^2= 6m/s^2[/math]

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ma se devo calcolare l'accelerazione, a che mi serve la formula dello spazio? io la fisica non la capisco

17 Febbraio 2014

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