Answer:
a) v=3.166 m/s
b) μ=0.0169
Explanation:
a)
The motion is totally inelastic collision so the mass of the person and the mass of the sled in the second part of the motion are add both.
![m_{p}*v_{p}+m_{s}*v_{s}=(m_{p}+m_{s})*v_{f}\\60kg*3.8\frac{m}{s}+12kg*0\frac{m}{s}=(60kg+12kg)*v_{f}](https://tex.z-dn.net/?f=m_%7Bp%7D%2Av_%7Bp%7D%2Bm_%7Bs%7D%2Av_%7Bs%7D%3D%28m_%7Bp%7D%2Bm_%7Bs%7D%29%2Av_%7Bf%7D%5C%5C60kg%2A3.8%5Cfrac%7Bm%7D%7Bs%7D%2B12kg%2A0%5Cfrac%7Bm%7D%7Bs%7D%3D%2860kg%2B12kg%29%2Av_%7Bf%7D)
![228 \frac{kg*m}{s}=72kg*v_{f}\\ v_{f}=\frac{228\frac{kg*m}{s}}{72kg}](https://tex.z-dn.net/?f=228%20%5Cfrac%7Bkg%2Am%7D%7Bs%7D%3D72kg%2Av_%7Bf%7D%5C%5C%20v_%7Bf%7D%3D%5Cfrac%7B228%5Cfrac%7Bkg%2Am%7D%7Bs%7D%7D%7B72kg%7D)
b)
The motion have friction so the force and coefficient can be find using Newtons second law where
![f_{k}=u*m*a*x](https://tex.z-dn.net/?f=f_%7Bk%7D%3Du%2Am%2Aa%2Ax)
![K=\frac{1}{2}*m*(v)^{2}\\](https://tex.z-dn.net/?f=K%3D%5Cfrac%7B1%7D%7B2%7D%2Am%2A%28v%29%5E%7B2%7D%5C%5C)
![-u*m*g*x=\frac{1}{2}*m*(v*cos(180))^{2}\\-u=-\frac{v^{2}}{2*g*x}\\u= \frac{3.16^{2}}{2*9.8*30}\\u=0.0169](https://tex.z-dn.net/?f=-u%2Am%2Ag%2Ax%3D%5Cfrac%7B1%7D%7B2%7D%2Am%2A%28v%2Acos%28180%29%29%5E%7B2%7D%5C%5C-u%3D-%5Cfrac%7Bv%5E%7B2%7D%7D%7B2%2Ag%2Ax%7D%5C%5Cu%3D%20%5Cfrac%7B3.16%5E%7B2%7D%7D%7B2%2A9.8%2A30%7D%5C%5Cu%3D0.0169)
Answer:
A,B,D,E,F
Explanation:
I took the test for yall.
The answer would be altitude.
Quito has the altitude of 2.850m, while Guayaquil has the altitude of 5m.
This can lead to the vast difference in climates.
The most noticeable difference is that temperature drop with increased altitude.
F<span>or each 1,000 foot rise in altitude, there is a 4°F drop in temperature.</span>
The answer is shape, waves keep the same shape when bouncing off something