Section 6.5

# Section 6.5 - the hydrostatic force against the gate 563458...

This preview shows pages 1–3. Sign up to view the full content.

Section 6.5 (Homework) 1. [SCalcCC2 6.5.04.] 3/3 points Last Response | Show Details All Responses Notes A spring has a natural length of 20 cm. If a 29 N force is required to keep it stretched to a length of 30 cm, how much work is required to stretch it from 20 cm to 25 cm? .36 0.362 J 2. [SCalcCC2 6.5.06.] 3/3 points Last Response | Show Details All Responses Notes If 6 J of work are needed to stretch a spring from 10 cm to 12 cm and another 10 J are needed to stretch it from 12 cm to 14 cm, what is the natural length of the spring? 8 8 cm 3. [SCalcCC2 6.5.14.] 3/3 points Last Response | Show Details All Responses Notes The tank shown is full of water. Given that water weighs 62.5 lb/ft 3 , find the work required to pump the water out of the tank. 30700 30700 ft-lb 4. 3/3 points Last Response | Show Details All Responses Notes

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
[SCalcCC2 6.5.24.] A vertical dam has a semicircular gate as shown in the figure below. Find
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: the hydrostatic force against the gate. 563458 563485 N 5. [SCalcCC2 6.5.26.] 3/3 points Last Response | Show Details All Responses Notes The masses m i are located at the points P i . Find the moments M x and M y and the center of mass of the system. m 1 = 7 , m 2 = 6 , m 3 = 1, m 4 = 5 ; P 1 (1,-2), P 2 (3,4), P 3 (-3,-7), P 4 (6,-1) M x = -2-2 M y = 52 52 center of mass = (2.74 2.74 ,-.105-0.105 ) 6. [SCalcCC2 6.5.28.] 2/2 points Last Response | Show Details All Responses Notes Sketch the region bounded by the curves, and visually estimate the location of the centroid. (Do this on paper. Your teacher may ask you to turn in this work.) Then find the exact coordinates of the centroid. (5.4 5.4 ,1.125 1.12 )...
View Full Document

## This note was uploaded on 10/28/2010 for the course MA MA 241 taught by Professor Lesliekurtz during the Spring '10 term at N.C. State.

### Page1 / 3

Section 6.5 - the hydrostatic force against the gate 563458...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online