
#1
Nov912, 05:36 PM

P: 5

Block A has a mass of 5.26 kg and is on a rough incline of 16.0°to the horizontal. Block B has a mass of 4.80 kg and the coefficient of kinetic friction between Block A and the plane is 0.204. What is the acceleration of the blocks?
Equations= fnet=ma Attempt:(4.8+5.26)a=(4.8)g(5.26)gsin(16°)(μ)(9.8)(5.26)(cos(16°)) Therefore a=3.00m/s^2 This comes out to be the wrong answer, according to the key. Help?! 



#2
Nov912, 05:55 PM

P: 7

I get 1.7 m/s^2. Tell me if thats right and i will explain.
i think you went wrong on the friction bit. Friction = UN and force N=FG. You didn't add all your masses for some reason on the friction part. 



#3
Nov912, 06:01 PM

P: 5





#4
Nov912, 06:11 PM

P: 7

Physics ramp/acceleration problem!
I see what i did XD
Lets see.... (If this isn't right, ill shoot myself...JK) Sum of F = ma Fg  Ff = ma mg  UN = ma m1+m2gsin(16)  U X m1+m2cos(16)=m1+m2(a) a= m1+m2gsin(16)  Ux m1+m2cos(16)/ m1+m2 a= 5.26+4.8sin(16)  0.204 X 5.26+2.8cos(16)/ 5.26+2.8 a=1.84 



#5
Nov912, 06:11 PM

P: 7

a = 1.84 m/s^2 :P



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