- #1
wikidrox
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These are two questions that I am having problems with. Here is the first.
1. The air in a 200km/h wind stikes a 30m by 20m face of building at the rate of 5.4 * 10^4 kg/s. Find the net force on the building, assuming the air comes to rest on impact.
Now for this I found the force by mutiplying the velocity by the mass per second. But I don't know where to go from there. Wouldn't the net force just be 0?
2. Calculate the impulse suffered when a 70 kg person lands on firm on the ground after jumping from a height of 5.0m.
I don't think I have enough info to answer this question.
1. The air in a 200km/h wind stikes a 30m by 20m face of building at the rate of 5.4 * 10^4 kg/s. Find the net force on the building, assuming the air comes to rest on impact.
Now for this I found the force by mutiplying the velocity by the mass per second. But I don't know where to go from there. Wouldn't the net force just be 0?
2. Calculate the impulse suffered when a 70 kg person lands on firm on the ground after jumping from a height of 5.0m.
I don't think I have enough info to answer this question.