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| Thread ID: 88253 | 2008-03-21 01:01:00 | Physics Question... | John W (523) | PC World Chat |
| Post ID | Timestamp | Content | User | ||
| 651256 | 2008-03-29 21:06:00 | I. was. being. sarcastic. Per your 2nd to last post, the fast/slow ramp is perfectly analogous for the straight/curved ramp question. I fail to see otherwise. You said "i don't even know what their answer to the problem is" but you already worked out the answer for yourself earlier on in this thread before I did. By 'consider/ignore' are you referring to friction and/or wind resistance? I don't know the answer to those factors but wind resistance or drag is a function of velocity and is therefore an interesting factor for the curved ramp. At the point on the curved ramp where the acceleration factor is the greatest, the wind resistance has its least effect and vice versa. So at the time you are accelerating the most, the drag is at its least. Not so for the inclined ramp - there you have a constant acceleration and an increasing drag. Interesting stuff but physics makes the brain hurt.... |
andrew93 (249) | ||
| 651257 | 2008-03-30 02:23:00 | I. was. being. sarcastic. - oops, didn't seem that way on my end Per your 2nd to last post, the fast/slow ramp is perfectly analogous for the straight/curved ramp question. I fail to see otherwise. - not perfect! different situation! You said "i don't even know what their answer to the problem is" but you already worked out the answer for yourself earlier on in this thread before I did. - yes but i wouldn't go tell someone they're wrong without listening to their answer first By 'consider/ignore' are you referring to friction and/or wind resistance? - yes, plus rolling resistance, the bounce at the end of the straight ramp, moment of rotational inertia and angular velocity at the bottom of the ramp etc etc I don't know the answer to those factors but wind resistance or drag is a function of velocity and is therefore an interesting factor for the curved ramp. At the point on the curved ramp where the acceleration factor is the greatest, the wind resistance has its least effect and vice versa. So at the time you are accelerating the most, the drag is at its least. Not so for the inclined ramp - there you have a constant acceleration and an increasing drag. Interesting stuff but physics makes the brain hurt.... that it does |
motorbyclist (188) | ||
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