How does wet grass affect time on a grassy course?

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5 years ago 10/13/2018 8:03am EDT

re: vandergraafgenerator

vandergraafgenerator wrote:
Well of course these things are true, just pointing out that i don't really think that FRICTION is a factor in the equation, grip yes, restitution yes, friction well no not really.
Friction that's what makes vandergraafgenerators work you know, nylon belt, nylon pulley = friction =static electricity.

Grip is the same thing as static friction. Your car doesn’t move forward on a road withought the coefficient of static friction because the wheel at the point of contact must not overcome the static friction else your wheel just spins. like spinning your wheels on a muddy cross country course

5 years ago 10/13/2018 9:29am EDT

re: runningonwetgrass

No one even mentioned the fact that if the course is sloppy no one will attempt to break the course record.

More people will go out slowly in those conditions.

5 years ago 10/13/2018 11:05am EDT

re: runningonwetgrass

Although sliding due to lowered friction can be a factor, I don't think it's friction so much as the softening of the surface that occurs when it's wet. If you ran in spikes you wouldn't be sliding much, but you'd probably still be a little slower.

A very stiff, elastic material like concrete returns the energy of your leg pushing off it very efficiently. Energy out = energy in or pretty close to it.

But a soft, deformable material like mud absorbs some of the energy your leg applies to the ground as you press into it. Energy out = energy in - energy absorbed, so to run the same speed you'd have to work a little bit harder. It's the same reason why it's harder to run fast in sand than it is on hard ground.

5 years ago 10/13/2018 12:50pm EDT

re: Harry Kooter

Harry Kooter wrote:
Wet grass on a grassy course affects time more than wet grass on a non-grassy course.

My thoughts exactly

5 years ago 10/13/2018 6:57pm EDT

re: runningonwetgrass

This really is a mor0nic question.

First nobidy outside America takes any notice of xc times. Did you ever her Bekele talk about what time he did over xc.

Now the reason.

Saying it's wet is like telling someone it's windy. One is ruffling your hair another is ripping the roof off you house.

How wet what is the soil composition. It can go from wet grass to a body you lose your spikes in. Every course is different even the gold courses you call xc in States

Xc should be about position not times

5 years ago 10/14/2018 5:54am EDT

re: runningonwetgrass

wet grass is better than dry bud, so it will be a better time

5 years ago 10/14/2018 10:55pm EDT

re: KozmoKramer

His father was a mudder!!

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