blackops23
Member
- Joined
- Dec 15, 2010
- Messages
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- HSC
- 2011
Hi guys, having trouble with (ii) of this question
Q. A small body is projected vertically downwards, with velocity u, in a medium which offers a resistance kv per unit mass when the speed is v.
(i) Prove that the speed approaches a limit that is independent of u.
(ii) T seconds later, an exactly similar body is projected vertically downwards with velocity u'. Show that the difference between the two bodies is ULTIMATELY
-------------
Now part (i) I got that as t-->infinity, v--> g/k
(ii) --> I have no idea what to do here. Help, starting pointers/tips or a full solution would greatly appreciated
Q. A small body is projected vertically downwards, with velocity u, in a medium which offers a resistance kv per unit mass when the speed is v.
(i) Prove that the speed approaches a limit that is independent of u.
(ii) T seconds later, an exactly similar body is projected vertically downwards with velocity u'. Show that the difference between the two bodies is ULTIMATELY
-------------
Now part (i) I got that as t-->infinity, v--> g/k
(ii) --> I have no idea what to do here. Help, starting pointers/tips or a full solution would greatly appreciated
