Nobody knows why, and we've heard theories from humidity to
the friction coefficient of the material at certain temperatures and conditions, but the fact is a lot of glass - backed nexus 4 phones won't stay on it.
The new performance mode in the Audi drive select dynamic handling system enables adaptation of the most important ride dynamics parameters to
the friction coefficient of the road.
Further improvements have been made in various areas, including the car's directional stability,
the friction coefficient of the wheel bearings, tire noise and weight, which has been reduced by 4.4 pounds on the front suspension alone.
Although some surfaces have
the friction coefficient of a banana skin, the amazing winter Michelins, attentive suspension, and astute electronic helpers bring about a surprise - free balance.
The resulting apparent
friction coefficient of 0.08 is considerably smaller than static values for most rocks.
Not exact matches
Put differently, the Cold War created a high
coefficient of friction in the global economy.
In physics problems, an elephant on a river bank becomes a mass with a
coefficient of friction, and a Beethoven symphony becomes a set
of molecular vibrations.
Flexible Packaging recently caught up with Dave Muchorski, director
of marketing at Testing Machines Inc., for an update on what's new in the field and how
coefficient of friction can impact printing and converting operations.
Testing Machines Inc (TMI) has introduced a new, enhanced 32 - 76e
coefficient of friction (COF) tester with added peel testing capabilities.
With no added plasticisers which might migrate and damage the parts, Tyvek ® is smooth with a low
coefficient of friction, making it also ergonomically efficient.
I'm so glad that I'm not a slob sometimes, and that it's just viscosity, shear & the
coefficient of friction... that's such a relief!
On the flip side, all players uniforms are to be composed
of materials for which this silicone oil has an exceedingly small
friction coefficient.
«Now we can make a proper calculation
of the
friction coefficients,» says Makkonen.
«The particular mixture ratio means that our composite has a very low
coefficient of friction.
The icy plank and the tub bottom had a lower
coefficient of friction than the dry wood and the tub.
Although the mass
of the tub and gravity did not change, the
coefficient of friction of the two ramp systems did.
A new technique used on gear tooth surfaces makes for a lower
coefficient of friction when the gears engage.
On surfaces with a split
coefficient of friction - patchy ice or standing water, for instance - DSC and Active Steering will compensate for the steering tug you feel as one set
of tires grips harder than the other, which could be a lifesaver.
Basic physics tells us that
friction is equal to the normal force times the
coefficient of friction, i.e:
For one, the
coefficient of friction decreases as the normal force increases (see this Wikipedia article for more details).
That and just overcoming the static
friction of all the accessories upon initial startup, as well as the
coefficient of friction of the belt itself will be lower when cold.
The carbon pads provide a more consistent
coefficient of friction and even better fade resistance.
Appropriate
coefficient of friction for most manual transmission synchronizers (other's synthetic gear oils are often too slippery for proper synchro engagement)
Maybe the electronic traction control is better but there are laws
of physics limiting what power can be put to the ground (like
coefficients of static, and dynamic,
friction).
When one
of these cars enters a corner fast (with the gas pedal down) its rear wheels will lose traction (will have a tendency to spin) and the centrifugal force the car is subject to combined with the reduced
friction coefficient to the rear wheels will lead their rear end off the curve.
The degree
of lock — which may be anywhere between 0 and 100 percent — is adjusted as required within a fraction
of a second, enabling wheel spin to be prevented on slippery surfaces, in instances where the right and left rear wheel have widely differing
friction coefficients, in tight bends and when changing direction with particular vigor.
Depending on driving style and the
coefficient of friction, it can send between 50 and 100 percent
of the available torque to the rear axle, and when Audi drive select is in dynamic mode and the ESC Electronic Stabilisation Control system is in its sport setting, power is transferred to the rear sooner and in greater amounts for even greater agility and more direct turn - in.
It is an active all - wheel - drive system that helps to ensure the optimal distribution
of drive power for optimum traction in most road scenarios, whether on long straights, through tight corners, or on surfaces with different
friction coefficients.
They are far lighter and have much higher
friction coefficient and needs a total reworking
of the servo system in order to avoid the horrible lurching stops the first gen systems were known for.
The degree
of lock — which may be anywhere between 0 and 100 per cent — is adjusted as required within a fraction
of a second, enabling wheel spin to be prevented on slippery surfaces, in instances where the right and left rear wheel have widely differing
friction coefficients, in tight bends and when changing direction with particular vigour.
Through an oil - temperature sensor, the SH - AWD ® Control Unit monitors the rear differential's clutch - plate
coefficient of friction (that changes with temperature) in each clutch pack and then adjusts the voltage to each electromagnetic coil to compensate.
With reactive activation, which rarely occurs in practice, the system reacts to sudden changes in the
coefficient of friction.
In dynamic mode, power is sent to the rear axle sooner and to a larger degree, improving the driving dynamics particularly at low
coefficients of friction.
quattro all - wheel drive is more frequently active in winter than in summer because the
coefficients of friction are lower then.
What's needed is a large flat VDA with a special asphalt formulation and a water - delivery system that can maintain a uniform depth
of water (the approximate thickness
of a quarter), so there's a consistent
coefficient of friction across the entire surface.
The corresponding working quasilinear wave equation for the barotropic azonal stream function Ψm ′
of the forced waves with m = 6, 7, and 8 (m waves) with nonzero right - hand side (forcing + eddy
friction) yields (34) u˜ ∂ ∂ x (∂ 2Ψm ′ ∂ x2 + ∂ 2Ψm ′ ∂ y2) + β˜ ∂ Ψm ′ ∂ x = 2Ω sin ϕ cos2 ϕT˜u˜ ∂ Tm ′ ∂ x − 2Ω sin ϕcos2 ϕHκu˜ ∂ hor, m ∂ x − (kha2 + kzH2)(∂ 2Ψm ′ ∂ x2 + ∂ 2Ψm ′ ∂ y2), [S3] where x = aλ and y = a ln -LSB-(1 + sin ϕ) / cos ϕ] are the coordinates
of the Mercator projection
of Earth's sphere, with λ as the longitude, H is the characteristic value
of the atmospheric density vertical scale, T˜ is a constant reference temperature at the EBL, Tm ′ is the m component
of azonal temperature at this level, u˜ = u ¯ / cos ϕ, κ is the ratio
of the zonally averaged module
of the geostrophic wind at the top
of the PBL to that at the EBL (53), hor, m is the m component
of the large - scale orography height, and kh and kz are the horizontal and vertical eddy diffusion
coefficients.
The parameterizations, I think engineers generally call these the heat and mass transfer
coefficients and
friction factor correlations, might need to cover wide ranges
of possible fluid and structure - interface conditions.
When needed, we employ forensic experts, such as engineers, who can establish
coefficients of friction for various surfaces, as well as an analysis
of conditions arising from design inadequacies or the failure to adhere to applicable building codes.
So, if you typically put your iPhone on armrests, sofas, or other non-flat surfaces, stop doing that or get a case with a higher
coefficient of friction.