desperate! final problem left!?

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desperate! final problem left!?

A person pushes on a stationary 125 N box with 75 N at 30 degrees below the horizontal. The coefficient of static friction between the box and the horizontal floor is 0.80.

http://tinypic.com/fullsize.php?pic=2en3wvm&s=2

2007-10-16 17:21:00 · 1 answers · asked by sandymandy 1 in Science & Mathematics ➔ Physics

1 answers

...and the question is?

f=uW=0.80 x 125= 100N
Fh= Fcos(30)=65N

I guess the box is not moving.

We need 35/cos(30) = 41 N of force more
total = 75 + 41= 116 N for the box to move

2007-10-17 04:02:49 · answer #1 · answered by Edward 7 · 0⤊ 0⤋