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1. blocks of equal mass M sits on a plane inclined at 30 degrees to the horizontal. The coefficient of friction between the lower block (A) and the plane is 0.50 and between the upper block (B) is 0.30. (a) Find the acceleration of each block and the normal force exerted on A by B (b) What happens if the two blocks are reversed do that B leads the way down?
What I did:
Nab = Normal (force of A exerted on B)Nab=NbaNab=Ma
F-Nab=MaF-Ma=MaF=2MaA=F/2M
?? The answer is both a=1.5m/s(squared) down the plane
2. (a) Pulleys in the system are massless and frictionless, what mass m must the ball have if it is to support the cylinder of mass M? (b) if m=M, find the acceleration of each of the objects?
What I did:T*=4TAm=AMm=M/4
F=maMg-T=m4a4T-4mg=4ma
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