A 0.5 kg water balloon is dropped from a balcony 40 meters from the ground. What is the balloon's velocity just as it hits the ground? (Ignoring air resistance)
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Expert's answer
2020-04-03T13:24:06-0400
Ignoring the air resistance means the case of free fall (gravity is the only force acting upon body).
h=v0t+2gt2
and
v=v0+gt,
where h - height, m;v - velocity, m/s; v0 - initial velocity, m/s; t - time, s; g - acceleration due to gravity, m/s2 (g≈9.8m/s2). In our case v0=0, so balloon will hit the ground at
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