Question about going fast.

physics my boy

in theory, they would be the same speed. however, the larger person would most likely take up more space, therefore more wind resistance. also, the larger person will exert more force on the ground, therefore a higher amount of friction.


i only took 1 year of high school physics so im not 100% but yeah, im pretty sure thats how it goes.

Pshh grade 11 physics kids, come on. So without any frictions or outside forces, theoretically like the last post said, they would go the same speed, but when you inlclude frictional forces such as wind resistance, gravitational force vs. slope angle and fraction of skis vs hill, usually the object of more mass will be able to attain a higher speed (although take into consideration the time of acceleration will be slower so if its a very small hill the smaller skier might finish first but if its over a good distance, realistically the onject of more mass will finish( and thus go faster) first

no in theory, in an ideal world, the larger dude would go faster. force of gravity=mass x 9.8. so the force of gravity going down the slope would be like mass x 9.8 x cos(angle of slope). the larger dude would go faster

but yeah it depends on his area and shit

but what about the whole an elephant and a feather would fall at the same speed in a vacuum thing?


again, i had one year of high school physics, def not my area of expertise here lol

more mass=more gravity pulling on it making it faster

FACT: Gravity is more or less constant throughout the whole world

Fatty (m1) has a greater mass then his anorexic daughter (m2), so he will have a greater weight (W1 > W2)  if they are at the same altitude.  W= Mg
If they are on a slope (we will assume 30 degrees from horizontal)
We will make the x axis to be parallel to the slope and the y axis to be perpendicular to the slope.
The y component of W1 will obviously be larger then that of W2,  Wcos(30). Since we know that there is no acceleration in the y direction for either skier, this also means that the normal force on Fatty (N1) will be greater then that on anorexia (N2), We will assume that they both have the same tune on there skis, and are in the same snow conditions, so the coefficient of friction (f) will be the same for both of them.  Since the max Frictional force (F) = N(f),
So to calculate the Frictional force for the skier F = Wcos(30)(f) = (Mg)cos(30)(f), this force is in the x direction. the other force in the x direction is that of the x component of the W,   equal to (Wsin(30)) = (Mg)sin(30),
The net force is equal to the Mass (M) times the acceleration (a), or also the sum of all the forces in the same direction.  Since the x component of the Weight is in the opposite direction of that of the friction we can write the equation
M(a)= (Mg)sin(30) - (Mg)cos(30)(f)
and to get the acceleration (a), we devide the equation by M,
and we get:
a = (g)sin(30) -(g)cos(30)(f)
so you can see that mass has nothing to do with it.

This is of course neglecting air resistance, but that is way to complicated to calculate since you need to figure out air displacement, the turbulance created, the vortexs created, and more and more, To do that, we would need to know the air friction of the clothing, all the different lines regarding how air passes over and around the skier (shape of helmet and goggles gloves ect into acount).

But ya mass has nothing to do with it,

The tune on the skis does.

gravity is stronger on the big guy

depends on whether or not one of them is in "an ultra fast tuck."

so i was right?

more or less,
friction is dependent on the normal force applied on the object, not the normal force applied by the object,
however, the two forces are equal, but it is good to remember which one is which.

i actually remember that! lol

If you drop a bowlingball and a golfball off a 30 ft high roof at the exact same time, they will hit the ground at the exact same time. Gravity is the same on both balls

weight doesn't matter.  mass and wind resistance do

ive usually figured that the big guy carries more momentum, and has bigger skis, therefore less friction on the snow, so the big guy will go faster

theres still gravity and mass in the vaccuum. just no air resistance. and i took into account friction and air resistance

newton got hit on head head and out came gravity dude

there are still gravitational forces in a vacuum,

the presence or lack of air resistance does not have any effect on the importance of mass or weight.

If weight does not matter then mass sure as hell won't either.

ski size has to do with it too. a big guy on short skis will go slower. if they both had properly sized skis, the bigger guy would probably win. there are so many variables so thats not 100% correct though

than how come my left one is higher?

he said same equipment. so thats not an issue. and the momentum doesnt effect his overall top speed, just means it takes more to stop him than to stop skinny.

ask isaac newton..

mass is proportional to volume

air resistance is proportional to surface area

if you increase an objects size, volume goes up faster than surface area goes up

so the volume to surface area ratio for the big skier is bigger than the volume to surface area for the smaller skier

so the force of acceleration to wind resistance ratio is larger for the big skier than it is for the small skier so the terminal velocity will be higher for the large skier.

aids mothafucka   R.I.P.

h=-16t^2+(h)0