- #1
ENGR_student
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Homework Statement
Determine the force necessary to accelerate a mass of 20 lbm at a rate of 60 ft/s^2 vertically upward.
Homework Equations
How do you properly account for weight?
What exactly is pound force?
How do you go from pound mass (lbm) to pound force (lbf)?
The Attempt at a Solution
F - mg = ma
F = m(g + a)
Unfortunately This is how I would do it in SI units. However it is not correct in English units. I'm very confused on how it goes from pound mass to pound force