- #1
scud0405
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Homework Statement
I've been given a problem that an object falls from a distance of 800 feet with an initial velocity of 4 f/s. Gravity acts on the object, but air resistance can be disregarded. Find the location at time t and find when the object hits the ground.
The Attempt at a Solution
I am confused on the formula. Is the formula that I need to use: [tex]\frac{dv}{dt} = g - \frac{bv}{m}[/tex] ?
So with all the numbers plugged in the formula would be:
[tex]\frac{dv}{dt} = 9.8 - \frac{12}{m}[/tex] ?
Then I can integrate this and solve to get the answer?
[tex]\frac{dv}{dt} + \frac{12}{m} = 9.8[/tex]
Mass is not given, so what do I do about the m? I'm completely lost and I just need a hint or two about how to setup the formula.
Thanks.