Apple is my first choice to reach that lofty goal. Typically buildings with tin roofs are light and flimsy, and it doesn’t take much force to rip the Ghost face mask over this boo sheet shirt in other words I will buy this roof off. In high winds, the wind blowing over a roof results in reduced pressure above the roof. This results in a pressure gradient force directed upwards across the roof. If that force is greater than what the bolts holding the roof can withstand, away goes the roof. Another reason for roofs going airborne is if there is any overhang, the wind gets underneath the overhang and pushes the edge of the roof up. The balloon is initially at constant speed. This means that there is no net forces acting on the balloon initially.
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