Answer:
![u_K=0.862](https://tex.z-dn.net/?f=u_K%3D0.862)
Explanation:
The force of friction between the quails feet and the ground is:
![F=m*a](https://tex.z-dn.net/?f=F%3Dm%2Aa)
![F_K=m*a](https://tex.z-dn.net/?f=F_K%3Dm%2Aa)
![F_K=u_k*m*g](https://tex.z-dn.net/?f=F_K%3Du_k%2Am%2Ag)
![u_K*m*g=m*a_c](https://tex.z-dn.net/?f=u_K%2Am%2Ag%3Dm%2Aa_c)
![u_K*g=a](https://tex.z-dn.net/?f=u_K%2Ag%3Da)
![u_K=\frac{a_c}{g}](https://tex.z-dn.net/?f=u_K%3D%5Cfrac%7Ba_c%7D%7Bg%7D)
![a_c=\frac{v^2}{r}](https://tex.z-dn.net/?f=a_c%3D%5Cfrac%7Bv%5E2%7D%7Br%7D)
So the coefficient of static is solve
![u_K=\frac{\frac{v^2}{r}}{g}](https://tex.z-dn.net/?f=u_K%3D%5Cfrac%7B%5Cfrac%7Bv%5E2%7D%7Br%7D%7D%7Bg%7D)
![u_K=\frac{v^2}{r*g}=\frac{(2.6m/s)^2}{0.80m*9.8m/s^2}](https://tex.z-dn.net/?f=u_K%3D%5Cfrac%7Bv%5E2%7D%7Br%2Ag%7D%3D%5Cfrac%7B%282.6m%2Fs%29%5E2%7D%7B0.80m%2A9.8m%2Fs%5E2%7D)
![u_K=0.862](https://tex.z-dn.net/?f=u_K%3D0.862)
Answer:
240cm
Explanation:
Speed = 6cm/s
Time = 40 seconds
Speed= distance/time
6cm/s = distance/40seconds
Distance = 6×40
Distance = 240cm
Hence, in 40 seconds, the ball must have rolled the distance of 240cm
I believe the answer is b) slowly heating the surface
Answer:
5.3 m/s
Explanation:
First, find the time it takes for him to fall 7m.
y = y₀ + v₀ t + ½ at²
0 = 7 + (0) t + ½ (-9.8) t²
0 = 7 − 4.9 t²
t ≈ 1.20 s
Now find the velocity he needs to travel 6.3m in that time.
x = x₀ + v₀ t + ½ at²
6.3 = 0 + v₀ (1.20) + ½ (0) (1.20)²
v₀ ≈ 5.27 m/s
Rounded to two significant figures, the man must run with a speed of 5.3 m/s.
Answer:
Conductors have magnetic fields; insulators do not have magnetic fields. Conductors do not have magnetic fields; insulators do have magnetic fields. ... In a conductor, electric current cannot flow freely; in an insulator, it can flow freely.