contestada

A 58 kg skier is going down a 35 degree slope. The areaof each
ski in contact with the snow is 0.3 m^2. Determinethe pressure that
each ski exerts on the snow.

Respuesta :

To solve this problem we will use a free body diagram that allows us to determine the Normal Force.

In general, the normal force would be equivalent to

[tex]N = mgcos\theta[/tex]

Since the skier is standing on two skis, his weight will be divide by two

[tex]N' = \frac{mgcos\theta}{2}[/tex]

Pressure is given as the force applied in a given area, that is

[tex]P = \frac{F}{A}[/tex]

Replacing F with N'

[tex]P = \frac{N'}{A}[/tex]

[tex]P = \frac{\frac{mgcos\theta}{2}}{A}[/tex]

Our values are given as,

[tex]m = 58kg[/tex]

[tex]g = 9.8m/s^2[/tex]

[tex]\theta = 35\°[/tex]

[tex]A = 0.3m^2[/tex]

Replacing we have that

[tex]P = \frac{\frac{(58)(9.8)cos(35)}{2}}{0.3}[/tex]

[tex]P = 776.01Pa[/tex]

Therefore the pressure exerted by each ski on the snow is 776.01Pa

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