OMG Step 1 was soooo hard

chusteczka

Diamond Member
Apr 12, 2006
3,399
3
71
Taking that first step is difficult because you must overcome frictional resistance to movement. The second step will be easier with less friction due to momentum.
 

eLiu

Diamond Member
Jun 4, 2001
6,407
1
0
Taking that first step is difficult because you must overcome frictional resistance to movement. The second step will be easier with less friction due to momentum.

The words you're looking for are 'static friction' and 'kinetic (or dynamic) friction'. It's often (but not always) true that static friction <= dynamic. Though from what I've learned you should really only expect a difference when the surfaces are wet (lubricated). Momentum has nothing to do with it.
 

SirStev0

Lifer
Nov 13, 2003
10,449
6
81
Med School Boards?
Yeah they suck. Step One especially.

Step Two used to be your reward for passing Step One but word is that the last two years it has blown as much.
 

chusteczka

Diamond Member
Apr 12, 2006
3,399
3
71
The words you're looking for are 'static friction' and 'kinetic (or dynamic) friction'. It's often (but not always) true that static friction <= dynamic. Though from what I've learned you should really only expect a difference when the surfaces are wet (lubricated). Momentum has nothing to do with it.

Thank you for filling in the holes in my memory. :)
 

deadlyapp

Diamond Member
Apr 25, 2004
6,641
726
126
The words you're looking for are 'static friction' and 'kinetic (or dynamic) friction'. It's often (but not always) true that static friction <= dynamic. Though from what I've learned you should really only expect a difference when the surfaces are wet (lubricated). Momentum has nothing to do with it.

I think you meant that static friction typically is greater than kinetic friction.
 

ElFenix

Elite Member
Super Moderator
Mar 20, 2000
102,382
8,515
126
collecting underpants isn't that hard. no idea what you're going to do when you get to 2. that's the hard one.
 

Born2bwire

Diamond Member
Oct 28, 2005
9,840
6
71
Heh, well now that you got the underpants I have a strong feeling that you'll reassess your feelings about step 1 when you attempt st...

God dammit ElFenix.
 

Mo0o

Lifer
Jul 31, 2001
24,227
3
76
How long did you study for? It wasnt that bad when I took it. Are you shooting for a particular score?
 

Schadenfroh

Elite Member
Mar 8, 2003
38,416
4
0
Just remember, you do not have an addiction if you know you can quit anytime you want, only thing holding you back is that you do not want to quit.
 

Squisher

Lifer
Aug 17, 2000
21,204
66
91
Is this thread about buttsex?
captainobvious.jpg
 

PlasmaBomb

Lifer
Nov 19, 2004
11,636
2
81
The words you're looking for are 'static friction' and 'kinetic (or dynamic) friction'. It's often (but not always) true that static friction <= dynamic. Though from what I've learned you should really only expect a difference when the surfaces are wet (lubricated). Momentum has nothing to do with it.

Static Friction > Dynamic Friction

(typically)

Which is why your car takes longer to stop if you lock the wheels/tires.
 

Farmer

Diamond Member
Dec 23, 2003
3,334
2
81
Static Friction > Dynamic Friction

(typically)

Which is why your car takes longer to stop if you lock the wheels/tires.

Uhh....?

Wheels not locked: Dynamic friction between brake pad and brake rotor.
Wheels locked: Dynamic friction between tire and pavement.

.....
 

PlasmaBomb

Lifer
Nov 19, 2004
11,636
2
81
Uhh....?

Wheels not locked: Dynamic friction between brake pad and brake rotor.
Wheels locked: Dynamic friction between tire and pavement.

.....

Key word - tire

Wheels rotating - coefficient of static friction between tire and road.

Wheels locked - coefficient of dynamic friction between tire and road.

The dynamic friction of the pads/rotors is designed to be high - when the brakes are applied the pads transfer small amounts of friction material to the rotor (majority of this occurs during bedding in). The friction material on the pad and rotor then sticks to each other, slowing the vehicle.

The other thing to remember is that comparing static and dynamic friction only works within the same system i.e., changing between rotors and tires changes systems and you can't draw comparisons between static and dynamic friction as easily.