大一物理阻力題.

2008-10-04 12:25 pm
An object is dropped from rest. Find the terminal speed assuming that the drag force is given by D=bv^2

回答 (3)

2008-10-04 4:09 pm
參考: Myself~~~
2008-10-05 12:18 am
我想問為什麼令v=tan ,而不是sin或cos ,1-tan^2又不等於sec^2
2008-10-04 6:58 pm
Some suggestion

to find the terminal velocity only

At terminal velocity

net force = 0
We have F=mg-bv^2=0
v=(mg/b)^0.5

If you need the terminal velocity only, no need to find the motion.


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