Answer:
Step-by-step explanation:
23.37
Answer:
2,400 foot-pounds
Step-by-step explanation:
Say at any instant x is length of Rope
Work done in lifting rope by dx amount will be:
dw = -(2.5x + 10)dx
w = -(40)∫(2.5x+10)dx
w = (2.5(40)^2) / 2 + 10(40)
w = 2000 + 400
w = 2,400 foot-pounds
Answer:
12(1/4)
Step-by-step explanation:
5(1/2)+6(3/4)
Change to common denominator,
5(2/4)+6(3/4)
5+6=11 and (2/4) + (3/4) = 1 (1/4)
11 + 1 (1/4)= 12 (1/4)
Answer:
π/4
Step-by-step explanation:
The reference angle will be the minimum of the absolute value of the angle, and the difference of that absolute value and pi.
ref angle = min(|-3π/4|, π -|-3π/4|) = min(3π/4, π/4)
ref angle = π/4
