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    Net Force on a window

    1. Homework Statement An airplane is flying at an elevation of 12500 m. The window on an airplane is a square of length 0.115 m on each side. What is the net force on the window? 2. Homework Equations P = Po + pgh p = 1.26 kg/m^3 Pair = 101.3 kPa 3. The Attempt at a Solution...
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    Work Done By a Gravitational Force

    Hi, I'm having trouble understanding this concept. A refrigerator is on a ramp of length d and it is being pushed up the ramp. What is the work done by the gravitational force? In the book it says mgdcos180 which is -mgd. I thought that the horizontal component of gravity was mgsin(theta) so...
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