Question

A heavy rope, 40 ft long, weighs 0.7 lb/ft and hangs over the edge of a building 110 ft high. (Let x be the distance in feet below the top of the building. Enter $x_i^*$ as $x_i$.) (a) How much work W is done in pulling the rope to the top of the building? Show how to approximate the required work by a Riemann sum. $lim_{n o infty} sum_{i=1}^{n} left( oxed{F(x_i)} ight) Delta x$ Express the work as an integral. $int_0^{20} oxed{ } dx$ Evaluate the integral. $oxed{ } ft-lb$ (b) How much work W is done in pulling half the rope to the top of the building? Show how to approximate the required work by a Riemann sum. $lim_{n o infty} sum_{i=1}^{n} oxed{ } Delta x$ Express the work as an integral. $int_0^{20} oxed{ } dx$ Evaluate the integral. $oxed{ } ft-lb$

          A heavy rope, 40 ft long, weighs 0.7 lb/ft and hangs over the edge of a building 110 ft high. (Let x be the distance in feet below the top of the building. Enter $x_i^*$ as $x_i$.)
(a) How much work W is done in pulling the rope to the top of the building?
Show how to approximate the required work by a Riemann sum.
$lim_{n 	o infty} sum_{i=1}^{n} left( oxed{F(x_i)} 
ight) Delta x$
Express the work as an integral.
$int_0^{20} oxed{ } dx$
Evaluate the integral.
$oxed{ } ft-lb$
(b) How much work W is done in pulling half the rope to the top of the building?
Show how to approximate the required work by a Riemann sum.
$lim_{n 	o infty} sum_{i=1}^{n} oxed{ } Delta x$
Express the work as an integral.
$int_0^{20} oxed{ } dx$
Evaluate the integral.
$oxed{ } ft-lb$

A heavy rope, 40 ft long, weighs 0.7 lb/ft and hangs over the edge of a building 110 ft high. (Let x be the distance in feet below the top of the building. Enter xi^* as xi.)
(a) How much work W is done in pulling the rope to the top of the building?
Show how to approximate the required work by a Riemann sum.
limn o infty sumi=1^n left( oxedF(xi)
ight) Delta x
Express the work as an integral.
int0^20 oxed dx
Evaluate the integral.
oxed ft-lb
(b) How much work W is done in pulling half the rope to the top of the building?
Show how to approximate the required work by a Riemann sum.
limn o infty sumi=1^n oxed Delta x
Express the work as an integral.
int0^20 oxed dx
Evaluate the integral.
oxed ft-lb

Added by Michael C.

Question

Please give Ace some feedback