- #1
chelito19
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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