The pickup of the figure shown is travelling at a constant speed of 50 mi/h and is carrying a 60-lb box in the back. The box projects 1 ft above the cab of the pickup. The wind resistance on the box can be approximated as a uniformly distributed force of 25 lb/ft on the exposed edge of the box. Calculate the minimum coefficient of friction required to keep the box from sliding on the bed of the pickup. Also determine whether or not the box will tip over.

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Q: w = 3 rad/s 26 in. 4 ft/s

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Q: A beam has a natural frequency of 1.179 hz and a damping ratio of 5%. It’s subjected to loads that…

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A:

Wind Energy

Wind energy is a renewable energy source that is used to generate electricity by wind power. The term, wind power, means utilization of kinetic energy of wind to generate electricity. Wind energy is termed renewable source energy because it can never be exhausted. There are other renewable energy sources, such as solar energy, geothermal energy, hydropower energy, and so on. All of them contribute to power the thermal energy stations to generate electricity.