Đổi 500g = 0,5 kg
Vận tốc của vật là :
Wđ = 1/2 . mv^2
=> v = √2Wđ/m = √2,25/0,5 = 10 (m/s)
Đáp án:
\(v = 10m/s\)
Giải thích các bước giải:
Động năng là:
\({{\rm{W}}_d} = \dfrac{1}{2}m{v^2} \Rightarrow 25 = \dfrac{1}{2}.0,5.{v^2} \Rightarrow v = 10m/s\)
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