Saturday

July 26, 2014

July 26, 2014

Total # Posts: 8

**Physics**

How would you derive the formula {-Ff+Fgx=ma} to show that µs=tanè

**physics**

A skier is going down a hill with a coefficient of friction of 0.21 and an angle of 7.5 degrees. if the skier has an initial velocity of 30 m/s, how fast will she be going after 10 s

**physics**

A Fletcher's trolley is set up over a cliff. If m1 = 40.5 kg (on top of the cliff) and m2 = 18.5 kg (hanging over the edge), what coefficient of friction is needed for the system not to move?

**Chemistry**

18

**Algebra 2**

hi

**Algebra**

#2 elimination 3x-7y=6 +2x+7y=4 ________ 5x =10 x =2 if x is 2, you plug it in 2(2)+7y=4 7y=4-4 y=0 (2,0)

**Math**

for the second one you take the log of both sides -x+3log9=log95 then you do algebra -x=(log95/log9) -3

**math**

plug 400 into x 350(400) - 70

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