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3 years ago

What is the main reason people and bears slip and fall on ice, be careful when outside in the snow/ice.

Physics

1 answer:

Ket [755]3 years ago

8 0

Answer:

Both ice and snow have a lower coefficient of friction in comparison with grass, wood or pavement.

Explanation:

The main reason why people and bears, slip and fall on ice/snow is that both ice and snow have a lower coefficient of friction in comparison with grass, wood or pavement. We present below a comparative chart of coefficients of friction associated with different materials:

Material Coefficient of Friction - Static

Ice/Snow 0.05 - 0.3

Wood 0.2 - 0.6

Asphalt 0.5 - 0.7

Grass 0.3 - 0.5

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4 years ago

Find deacceleration An engineer in a locomotive sees a car stuck on the track at a railroad crossing in front of the train. When

earnstyle [38]

Answer:

The deceleration is $a = -0.7273 \ m/s^2$

Explanation:

From the question we are told that

The distance of the car from the crossing is $d = 360 \ m$

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$d_r = u * t$

=> $d_r = 16 * 0.53$

=> $d_r = 8.48 \ m$

Generally distance of the car from the crossing after the engineer reacts is

$D = d- d_r$

=> $D = 360 - 8.48$

=> $D = 352 \ m$

Generally from kinematic equation

$v^2 = u^2 + 2as$

Here v is the final velocity of the car which is 0 m/s

$0^2 = 16^2 + 2 * a * 352$

=> $a = -0.7273 \ m/s^2$

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3 years ago

Ozone gas absorbs the ultraviolet radiations of the sun in the

bija089 [108]

Hello,

The answer is option C "<span>thermosphere".</span><span>

Reason:

The troposphere is the layer of the air that the harmful heat rays (from the sun is mostly absorbed). The thermosphere is directly above the exosphere which is the sphere with the thin layer of the sphere therefore the answer should be option C.

If you need anymore help feel free to ask me!

Hope this helps!

~Nonportrit</span>

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3 years ago

Read 2 more answers

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Hitman42 [59]

If we assume that the acceleration is constant, we can use on the kinematic equations:

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3 years ago

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Leona [35]

Answer:

it takes 5.22 seconds