Need help for Physics Question! Thanks!

The total force needed to drag a box at constant speed across a surface with coefficient of kinetic friction mk is least when the force is applied at an angle q such that

a.
sinq = mk.

b.
cosq = mk.

c.
tanq = mk.

d.
cotq = mk.

e.
secq = mk.

所有跟帖： 

• 回複：Need help for Physics Question! Thanks! -oldbookworm- ♂ (1 bytes) () 09/30/2009 postreply 22:26:22

• Can you show your work? Thank! -pingshi- ♂ (0 bytes) () 10/01/2009 postreply 00:23:00

• 回複：Can you show your work? Thank! -oldbookworm- ♂ (804 bytes) () 10/01/2009 postreply 21:04:48

• Thank you so much !! If I did not learn Calculus,how could I sol -pingshi- ♂ (0 bytes) () 10/02/2009 postreply 00:48:46

• 回複：Thank you so much !! If I did not learn Calculus,how could I -oldbookworm- ♂ (749 bytes) () 10/02/2009 postreply 21:47:15

• Thanks! I get your idea. -pingshi- ♂ (0 bytes) () 10/02/2009 postreply 23:54:18

• post in chinese high school forums, any high school kid in china -smallking- ♂ (0 bytes) () 10/11/2009 postreply 18:41:50