Answer: F = 131.7N
Explanation:
You are given the following parameters.
Mass M = 30 kg
Coefficient of static friction μ = 0.5
Ø = 30 degrees
When the person is trying to drag the box with force F, the static frictional force Fs will be acting in the opposite direction.
From the figure attached, resolve all forces into horizontal component and vertical component.
Horizontal component:
Fs - F cosØ = 0
Fs = F cosØ
F cosØ = μN ...... (1)
Vertical component:
N + F SinØ - mg = 0
N = Mg - F SinØ ..... (2)
Substitutes m, g and Ø into the equation 2
N = (30 × 9.8) - F × sin30
N = 294 - 0.5F
Substitute N and coefficient of friction into the equation (1)
F cos30 = 0.5 (294 - 0.5F)
Open the bracket
0.8660F = 147 - 0.25F
Collect the like terms
1.116025F = 147
F = 147/1.116025
F = 131.7 N
Therefore, the minimum force the person needs to have to move the box along the floor is 131.7 N
If you are charged to manage a project that aims to install wireless access points (aps) throughout the university campus, the steps to a foolproof plan for this project would be -
1. Recognize all of your network’s needs.
The most crucial step in any WiFi installation is probably knowing what your network needs are.
2. Select the appropriate hardware for your wireless network
Finding the ideal access point is much simpler if your needs are clear, but the wide range of options might be difficult.
3. Recognize your devices’ network restrictions.
It’s crucial to keep in mind that other factors besides your Internet connection and network hardware might affect how well your network performs.
4. Take into account the various cables you’ll need to use.
5. Consider how nearby interference may affect the installation of your wireless access point.
6. Decide where to put your wireless access point.
7. Analyze signal strength prior to making a decision.
To know more about access points (aps) visit:
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Iron
Iron is a chemical element with symbol Fe (from Latin: ferrum) and atomic number 26. It is a metal in the first transition series.
( Source : Wikipedia )