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## Homework Statement

A block of mass m slides down the incline of a triangular block of mass M. The angle of inclination is [tex]\theta[/tex]. The trianguilar block is free to slide on a horizontal plane. Assume that all surfaces are frictionless. What is the acceleration of the mass M?

## Homework Equations

F(net)=ma=0

## The Attempt at a Solution

so basically i want to ask if my answer is correct, as I'm not familiar with this type of problem, i got:

F(horizontal) = mg cos [tex]\theta[/tex] sin [tex]\theta[/tex]

a(M, horizontal) = F(horizontal) / (m + M)

is this right?

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