(a) What is the resultant force exerted by the two cables supporting the traffic light in Figure P4.55? (answer in N and in which direction: dwnward,upward, leftward, rightward)
(b) What is the weight of the light? (answer in N)
Here is the image to it...
http://img.photobucket.com/albums/v372/smilytwinkle/trafficlight.jpg
2007-10-02 07:32:11 · 2 answers · asked by pinkepromise 2 in Science & Mathematics ➔ Physics
The horizontal components of forces exerted by the two cables cancel out, vertical components are added up.
The resultant force exerted by the two cables supporting the traffic light = (2cos45) 60 N =60 x 1.414=84.84 N
The resultant force balances the weight of light.
The weight of the light =84.84 N
The resultant force 84.84 N acts vertically upwards
2007-10-02 07:48:34 · answer #1 · answered by ukmudgal 6 · 1⤊ 0⤋
a) 2(60)/sqrt(2) N up (84.85N)
b) is a) in magnitude, but down
2007-10-02 14:39:17 · answer #2 · answered by supastremph 6 · 0⤊ 0⤋