ramenluver50 said:Homework Statement
A skier of mass 57 kg skis down a 10° slope @ constant velocity.
The force of air resist. has a magnitude of 74 N. Find the frictional force on the skis.
Homework Equations
F=ma
F(fr) = (mu)(Fn)
The Attempt at a Solution
I found Fn= ma
where is 558N
so far i tried, 74sin10- 558
and i tried drawing a body diagram, where 558 is directly upwards, 9.8 down for gravity, the downward slope of 74 N at 10 deg
ramenluver50 said:it would be the sum of normal force, and air resistance?
so it should be 74 +558 ?
ramenluver50 said:air resistance is opposite to the velocity, and friction force should be the same,
gravitainal force opposes it but i don't think directly bc its is not parallel to the slope.
ramenluver50 said:it is sin, (lookin for the Y component of the slope)
which i had (74 sin 10),
ramenluver50 said:umm I am lost now... maybe i drew it wrong...
the air resistance is the magnitude isn't it?
iono.. start over?
Frictional force is the resistance that occurs when two surfaces come into contact and move against each other. In the case of skiing, frictional force plays a crucial role in determining how easily the skis glide over the snow.
The frictional force on skis can be calculated by multiplying the coefficient of friction between the ski and the snow by the weight of the skier. This will give you the maximum frictional force that can be exerted on the skis.
The frictional force on skis can be affected by various factors such as the type and condition of the snow, the angle of the slope, the weight and speed of the skier, and the design and materials of the skis.
Waxing is a technique used to reduce the frictional force on skis. It involves applying a layer of wax on the bottom of the skis, which helps to reduce the resistance between the ski and the snow. This allows the skis to glide more easily and smoothly.
No, the frictional force on skis cannot be completely eliminated. However, it can be reduced by using techniques such as waxing, choosing appropriate ski equipment, and adjusting skiing techniques.