IMG_20191016_100237.jpg - DATE NO EX A 300 LB BOX IS HELD AT REST ON A SMOOTH INCLINE BY A FORCE P MAKING AN ANGLE W THE INCLINE AS SHOWN IF 0 = 45 DET

IMG_20191016_100237.jpg - DATE NO EX A 300 LB BOX IS HELD...

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Unformatted text preview: DATE: NO: EX A 300 LB BOX IS HELD AT REST ON A SMOOTH INCLINE BY A FORCE P MAKING AN ANGLE W / THE INCLINE AS SHOWN . IF 0 = 45 . DET. THE VALUE OF P AND THE NORMAL REACTION N ON THE INCLINE. 300 # P F.B.D 30 45 30 N EFX * 0 ; P cos 45 - 300 sin 30 = 0 ; P = 212.13# E F y = 0 ; N - 300 cos 30 - 212 . 13 sin 4 5= 0 ; N = 409.81# ANOTHER SOLUTION: FORCE A 300# 30 45 N = 300 45 X 105( sin105 sin 45 N 30 N = 409. 81 # N 300# P = 300 ; P - 212 . 13# sin 30 sin 45...
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