I like your last solution on attachment 2 except...
Integral from 0 to 2 (x-x^2-x) dx is not Int (2x - x^2) dx
I think you just have an algebra mistake there.
Wow, that makes sense. (I had to measure the stairs myself to.)
Thanks very much for replying so quickly!
I got 21.33s
Work = 5303.8J
Power = 248Watts = 0.332hp
That seems reasonable, right?
Homework Statement
Determine the time it takes to climb three flights of stairs (height = 9.7m). Compute the work done against gravity. Compute the average power expended in watts and in horsepower.
Person = 150lbs.
Homework Equations
h = 9.7m
4.45N/1lb
Avg Power = change in...
Homework Statement
a)Construct a 3x3 matrix, not in Echelon form, whose columns do NOT span R3. Prove.
b)Can a set of 3 vectors Span all of R4? Explain.
Homework Equations
The Attempt at a Solution
a)OK...I can make up plenty of matrices in Echelon form that fit, but how do I...