Recent content by luvlybug1025

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...