Answer:
i dont really know what it is
mgh₁ + ½mv₁² = mgh₂ + ½mv₂²
Explanation:
Initial total energy = final total energy
PE₁ + KE₁ = PE₂ + KE₂
8m/s
Average Speed = distance / time = 400/50 = 8m/s
if i do give me brainliest ok ok