Question

Room A and Room B are divided by a door of typical size (like the door to the classroom). The pressure difference between Room A and Room B is 0.5 psi (pounds per square inch).The total force on the door is closest to hanging which object onto the door?a.a pencil (<0.1lb)b.cell phone (~0.1lb)c.Giancoli textbook (~1lb)d.a car (~1000 lbs)

a.a pencil (<0.1lb)

b.cell phone (~0.1lb)

c.Giancoli textbook (~1lb)

d.a car (~1000 lbs)

Answer 1

Solution from the formula of Relation between force and pressure Pressure = force Area as given in the problem - Pressure p = 0.5 pound Inich or P = Pound D.S X 12 x 12 ft? 1 ft = 12 Bich} Pa classroom door area = 500 ft2 12 X 500 다 if a 72 pound/4+2 is approximately An average there fore force 36,000 pound (166) pencil is hanged fpencil mxg as we know Frencie < 0.1% 32:14 g= 32.14 ft/g2 < 3-2 fltf) pounds! usong options cellpene Oo il 6 = mx b fcellphone 3.2 lof text book man 1 lb ftextbook n 1x 32.14 32.14 lbf (d) car mn 1000 llos fear 1000 X 32:14 fcal 32,240 lbf closest to the force that we have calculated. correct Option : car (~1000 lbs)