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## Homework Statement

a 250 pound mass, is released in rest (hanging at 20 ft) and pulls a 400 pound mass up a ramp with a 30º angle, the coefficient of friction between the 400 pound mass and the ramp is 0.5. Determine the velocity as the 250 pound mass hits the ground

## Homework Equations

for the 400 pound mass

T-Fk-mgsin30=m1a

N-mgcos30=0

for the 250 pound mass

T-W=m2a

## The Attempt at a Solution

when i have two equations to solve, my acceleration is negative -26.5 m/s2, because the mass is going down, but when i attempt to integrate to find the velocity, I need to find the time which also comes out negative giving me a not very logical answer