## Jusaquikie Group Title Block A in the figure below has mass mA = 5.0 kg and is sliding down the ramp. Block B has mass mB = 1.8 kg. The coefficient of kinetic friction between block B and the horizontal plane is 0.50. The inclined plane is frictionless and at angle 30°. 2 years ago 2 years ago

1. Jusaquikie

2. vannayen

find what?

3. Jusaquikie

Equations i have: (x1)Ft-Fk=m1a FT=m1a+(.18*29.4N) FT=(3*3.08) + 5.29=14.5 (x2) m2gsin(30)-FT=m2a (x2) 39.2-m1a+(.18*29.4N) =m2a (x2) 39.2-5.29=a(m1+m2) =11a 33.9/11=a=3.08 (y1)FN-m1g=0 FN=m1g=29.4N for some reason whenever i come here and write out my work i always see my mistake. maybe i should just type out every problem and save my self the time writing it out 3 times.

4. Jusaquikie

lol i even paseted the wrong problem

5. vannayen

|dw:1348881500104:dw| (mB) : (ox) : T - f =mB*a $f =\mu* mB*g$ we get T - 0.5*mB*g = mB*a (1) (mA) :(ox) $-T + mA*g \sin \theta =mA*a (2)$ take (1) + (2) a(mA +mB) = -0.5*mB*g +mA*g*sin30 a = 2.3m/s^2