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Because the water on the ground acts like an oil diminishing the grip. And when the ground is wet the water molecules resides between the ground and tires so, the tire is not in total contact with the ground.
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What causes road wear?
umm the road, friction between your tires and the roads surface.
How does friction make friction?
when 2 surfaces rube or slide together the more smooth the less friction
Why the maglev train is much quieter and uses less energy?
No contact with the ground (thus less friction).
Why longitudinal grooves on bridges?
The grooves or "tining" placed on concrete bridge decks (surfaces) are created for for automobile tire traction when it rains and to help direct the water runoff. Typically the grooves are created in the transverse direction across the direction of automobile travel. More recently longitudinal grooves have gained favor because there is less noise generated when tires follow longitudinal grooves when compared to more noise generated when tires cross transverse grooves.
A 200-kg car rounds a circular turn of radius 20 m If the road is flat and the coefficient of the friction between tires and road is 70 how fast can the car go without skidding?
define skidding.... 30mph.
Which tires produce less friction?
Narrower tires with harder rubber
When a cars tires are stuck in snow or mud is it better to have more less friction and why?
It is better to have less friction because it will be easier to get out.
What are the benefits of radial tires?
Compared to previous versions of tires, radial tires have less rolling friction or less friction with the road while in motion. The result of this is that the tires are generally quieter when driving on the road than the previous version and also allow for better fuel economy.
Why do bicycle tires generate less friction than car tires?
smaller cross-section of tread in contact with road
When a car's tires are stuck in snow or mud is it better to have more or less friction?
More
Using the ideas about friction and deceleration explain using a new tire than badly worn tires?
New tires actually have less friction on dry surface than old, bald tires, but once the old tires hit water, you new tires quickly win.
How does friction on tires effect the stopping distance of a car?
The more friction, the quicker the vehicle will stop, meaning less stopping distance.
When a vehicle hydroplanes its tires?
When a vehicle hydroplanes, the friction the tires are against is something other than the roadway - typically, it's a layer of water between the tires and the roadway. As the water has much less resistance and friction than asphalt, the tires spin much more freely.
Why does f1 cars need to change their tires so often?
so that less friction is caused, and to improve speed
Are wider car tires better than narrow car tires?
Yes if you want better road holding. No if you want less friction and better fuel economy.
Does spinning tires in the snow give off thermal energy by friction?
Yes. But it will likely only melt a thin film of water, which will freeze and become ice the minute the tire stops spinning. Also, by stepping on the gas and spinning the tires rather than ease your way out of the snow, the tires have less traction. Reason is when the tires spin, you have kinetic friction between the tire and the snow. If the tire is rolling over the snow, you have static friction. Static friction is greater than kinetic friction. Point being: don't spin your tires if you want to avoid getting stuck.
What part of a bicycle is a useful friction?
The brakes! And the tires (no friction = no traction).
