mass = 30kg
frictional force = coefficient of friction * (mass * g)
g = 9.8 m/s^2
So:
60N = x * 294 N
x = 60 N / 294 N = 0,2
Ans: A quantity cannot have units until it has dimensions. A quantity that has dimensions must have units. Yes a quantity have units but still be dimensionless for example,unit of angle is radian ,but it is a dimensionless quantity. A dimensionless quantity may have unit.
Answer:
Area=1.5(1.5)=2.25m^2
Force of gravity=10N
\begin{gathered}\\ \sf\longmapsto Pressure=\dfrac{Force}{Area}\end{gathered}
⟼Pressure=
Area
Force
\begin{gathered}\\ \sf\longmapsto Pressure=\dfrac{10}{2.25}\end{gathered}
⟼Pressure=
2.25
10
\begin{gathered}\\ \sf\longmapsto Pressure=4.4Pa\end{gathered}
⟼Pressure=4.4Pa
Answer:
5.05 m/s
Explanation:
The distance from the bottom of his feet to his center of mass is (when is hanging at rest) is 2.1 - 1.3 = 0.8 m. Assume he keeps the posture, as soon as his feet touches the ground, his center of mass is 0.8 m above the ground. This would mean that he has traveled a distance of 2.1 - 0.8 = 1.3 m vertically. Using the law of energy conservation for potential and kinetic energy, also let the ground be ground 0 for potential energy, we have the following mechanical conservation energy:
![mgH = mgh + mv^2/2](https://tex.z-dn.net/?f=mgH%20%3D%20mgh%20%2B%20mv%5E2%2F2)
Since he was hanging at rest, his initial kinetic energy at H = 2.1m must be 0. Let g = 9.81m/s2 and m be his mass, we can calculate for his velocity v at h = 0.8 m. First start by dividing both sides by m
![gH = gh + v^2/2](https://tex.z-dn.net/?f=gH%20%3D%20gh%20%2B%20v%5E2%2F2)
![v^2 = 2g(H - h)](https://tex.z-dn.net/?f=v%5E2%20%3D%202g%28H%20-%20h%29)
![v^2 = 2*9.81(2.1 - 0.8) = 25.506](https://tex.z-dn.net/?f=v%5E2%20%3D%202%2A9.81%282.1%20-%200.8%29%20%3D%2025.506%20)
![v = \sqrt{25.506} = 5.05 m/s](https://tex.z-dn.net/?f=v%20%3D%20%5Csqrt%7B25.506%7D%20%3D%205.05%20m%2Fs)
Answer:
The material through which sound is travelling
Explanation:
Solid has compact molecules so sound waves can moove easily and fastly.
In case of liquid, it has relatively less inter- molecular space so, sound transfers slowly..
Hope you can generate meaning regarding spped of sound in gas...
MAKE ME BRAINLIST PLEASE...