Question

Answer 1

a/ Đổi : \(v=54km\backslash h=15m\backslash s\)

\(v=v_o+at\Leftrightarrow15=120.a\Leftrightarrow a=0,125m\backslash s^2\)

b/ \(s=\dfrac{1}{2}at^2=900\left(m\right)\)

c/ \(v^2-v_o^2=2ás\)

\(\Leftrightarrow s=\dfrac{20^2}{2.0,125}=1600\left(m\right)\)