Vi = 25 m/s
Vf = 0 m/s
t = 5.0 s
Average acceleration:
"a = \\frac{V_f - V_i}{t}"
"a = \\frac{0 - 25}{5} = \\frac{-25}{5} = - 5 \\;m\/s^2" (negative sign indicates deceleration)
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