Homework Statement
A 54.0 g ice cube, initially at 0°C, is dropped into a Styrofoam cup containing 327 g of water, initially at 19.4°C. What is the final temperature of the water, if no heat is transferred to the Styrofoam or the surroundings?
Homework Equations
Q=mc(delta)T...
down is 9.8 (gravity,) down slope is 74 in mag. the slope from the X axis is 10 deg from it.the Y of the triangle i believe is (74 sin 10) and perpendicular to the slope i hav upward is 558 N
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.
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...
for Number 2,
i used the F=ma formula, where, 99.5 (1.09) to get the Newtons of 108, which is wrong...for #3, i got T3 which is 28 N, but for T1 and T2, do i just used T3 as the vertical measurement to find T1 and T2 ?
so your saying if i just find the X and Y for F they X and Y should be the same force equivalence to F1 and F2? , i tried for X where sin 33.1=X/65, and X would be 35.5, apparently the answer is incorrect.
EDIT:*******
sorry, you are right, i entered the answer in the wrong answer slot, haha.. thx