Thursday

April 17, 2014

April 17, 2014

Number of results: 133,523

**physics**

Explain what you mean by "center mass". Do you mean the location of the center OF mass? The center of mass of an arrow is forward of center. That makes it aerodynamically more stable. If you add mass to an arrow its velocity, for a given amount of bowstring pull, will decrease...
*Sunday, April 18, 2010 at 2:14am by drwls*

**physics**

You do not have to know how the mass is distributed, only that the center of mass is 5/6 of the way from one end. Require that the total moment about the fulcrum be zero. The lever arm to the center of mass from the fulcrum will be L/2 - L/6 = L/3 Let x be the location where ...
*Thursday, November 15, 2012 at 2:50am by drwls*

**physics**

Use the formula for center of mass. (∑ distance * mass) / total mass = center of mass The masses are what each man is holding, the distance is where each man is from some origin. If you set the origin on one of the men, his distance * mass is 0. Since we know the center ...
*Monday, November 9, 2009 at 10:16am by Philip*

**Physics**

say mass is area (density would cancel) original mass = pi R^2 with center at x = 0 mass of cutout = pi R^2/9 with center at x = (2/3)R mass of remaining = 8 pi R^2/9 with center at x 8 pi R^2/9 * x + pi R^2/9 * 2R/3 = pi R^2 * 0 8 x = - 2 R/3 x = - R/12 yes E
*Saturday, June 16, 2012 at 9:50pm by Damon*

**physics**

The canoe will move so that the center of mass of man plus canoe stays in the same place. The center of mass in the beginning is a distance X from center, in the back portion. 64.1*1.25 + 61*0 = 125.1 X X = 1.13 m When the man walks to within 0.75 m of the front of the canoe, ...
*Monday, December 3, 2012 at 5:07am by drwls*

**Physics**

two point masses are located in the same plane. the distance from mass 1 to the center of mass is 3.0m. The distance from mass 2 to the center of mass is 1.0m. What is m1/m2, the ratio of mass 1 to mass 2?
*Tuesday, March 29, 2011 at 5:02pm by Jacob*

**physics**

To balance a 40.8-kg automobile tire and wheel, a mechanic must place a 41.7-g lead weight 25.0 cm from the center of the wheel. When the wheel is balanced, its center of mass is exactly at the center of the wheel. How far from the center of the wheel was its center of mass ...
*Thursday, December 2, 2010 at 11:10pm by ann*

**Physics**

Is the center of the board located as the fulcrum. If so, then distance from center to child*child's mass = distance from center to mother*mother's mass. Note that the distances given in the problem are from the end and not the center.
*Monday, December 17, 2007 at 10:33pm by DrBob222*

**physics**

For the purposes of this problem, there are three parts to the figure, and the center of mass of each one is shown in the drawing. These parts are: (1) the torso, neck, and head (total mass = 40.4 kg) with a center of mass located on the y axis at a point 0.403 m above the ...
*Thursday, March 27, 2014 at 2:00pm by Anonymous*

**physics**

Two stars in a binary system orbit around their center of mass. The centers of the two stars are 7.78x1011 m apart. The larger of the two stars has a mass of 4.19x1030 kg, and its center is 1.75x1011 m from the system's center of mass. What is the mass of the smaller star?
*Thursday, March 27, 2014 at 1:58pm by Anonymous*

**Physics**

I understand the basics of the center of mass, but I'm having a hard time with this wire one: "A uniform piece of wire, 20 cm long, is bent in the center to give it an L-shape. How far from the bend is the center of mass?" If you could help that'd be great. Thank you!
*Monday, November 22, 2010 at 7:18pm by Trisha*

**physics**

A NON-UNIFORM board of length L and mass M has a center of mass at 5/6L. If the fulcrum is placed at the center of the board and a block of mass m is placed at the right of the board, then where must a block of mass 3m be placed to balance the board? I assumed new variables ...
*Thursday, November 15, 2012 at 2:50am by min*

**Physics**

a) The center of mass of the can is halfway up; the center of mass of the soda in the can is also halfway up when the can is full of soda, so the center of mass is (0.135*(12.4/2) + 1.25*(12.4/2))/(0.135+1.25) b) After the can loses all the soda, the center of mass is the ...
*Friday, November 9, 2012 at 9:53pm by Jennifer*

**physics**

The mass does not matter. The jumper's center of mass can be raised an amount H that is given by gH = V^2/2, assuming yjat the initial velolcity V is UP. Thus H = V^2/(2g) = 1.84 m = 6 ft 5 inches The actual high jump world record is higher than that (about 8 feet)because the ...
*Sunday, January 20, 2013 at 11:58pm by drwls*

**Physics**

This is soluble only if they both rods have the same mass distribution. If they do, the center of mass of the 0.95 m rod is at (0.475; 0) and has a mass of 0.95; the center of mass of the 1.8 m road is at (0; - 0.9) and has a mass of 1.8; the center of mass of those two ...
*Sunday, June 10, 2012 at 6:55pm by Elena*

**Physics**

Two stars in a binary system orbit around their center of mass. The centers of the two stars are 7.80 1011 m apart. The larger of the two stars has a mass of 3.50 1030 kg, and its center is 3.00 1011 m from the system's center of mass. What is the mass of the smaller star?
*Monday, October 24, 2011 at 4:04pm by Anne*

**Physics**

Two stars in a binary system orbit around their center of mass. The centers of the two stars are 7.80 1011 m apart. The larger of the two stars has a mass of 3.50 1030 kg, and its center is 3.00 1011 m from the system's center of mass. What is the mass of the smaller star?
*Monday, October 24, 2011 at 4:22pm by Anne*

**ap physics c**

Hi What is the center of mass of the following object measured from the center of the sphere?: a sphere of radius R and mass m2 is connected to a solid tube of mass m1 and length L Thank you!
*Tuesday, November 23, 2010 at 12:41pm by student2010*

**Physics**

A uniform piece of wire, 30 cm long, is bent in the center to give it an L-shape. How far from the bend is the center of mass? I know that the center of mass is ([m1]x+[m2]x)/([m1]+m2]), but I don't quite understand how to apply it to this problem.
*Monday, November 22, 2010 at 9:12pm by Avalon*

**physics**

The drawing shows a human figure approximately in a sitting position. For the purposes of this problem, there are three parts to the figure, and the center of mass of each one is shown in the drawing. These parts are: (1) the torso, neck, and head (total mass = 40.5 kg) with a...
*Saturday, October 15, 2011 at 1:32am by riley*

**physics**

The drawing shows a human figure approximately in a sitting position. For the purposes of this problem, there are three parts to the figure, and the center of mass of each one is shown in the drawing. These parts are: (1) the torso, neck, and head (total mass = 40.5 kg) with a...
*Sunday, October 16, 2011 at 9:16pm by riley*

**Physics**

I am not certain how to approach this. Sure a) asks for Work = F*x, so I take the integral of F*x with F= T-mg? b) Takes center of mass, but how do you get the center of mass of something that is constantly changing its position?
*Friday, October 15, 2010 at 10:49pm by Leshawn*

**physics**

Find the center of mass of the three mass system given that m1 1.90 kg and m2 1.30 kg Specify relative to the center of the left mass "1.00 kg "
*Wednesday, October 6, 2010 at 8:58pm by ami*

**Physics**

Two stars in a binary system orbit around their center of mass. The centers of the two stars are 7.40 1011 m apart. The larger of the two stars has a mass of 3.40 1030 kg, and its center is 2.50 1011 m from the system's center of mass. What is the mass of the smaller star?
*Tuesday, March 13, 2012 at 3:26pm by Natasha*

**Physics**

On a frictionless table, a glob of clay of mass 0.54 kg strikes a bar of mass 1.24 kg perpendicularly at a point 0.27 m from the center of the bar and sticks to it. 1. If the bar is 1.02 m long and the clay is moving at 6.3 m/s before striking the bar, what is the final speed ...
*Wednesday, February 12, 2014 at 11:14am by Neomi*

**physics**

This question begs for correction, as it is based on faulty reasoning. The centripetal force is about the center of rotation, not the center of the earth. When a mass is placed in orbit, take the moon for instance, both the moon and the Earth rotate about the center of ...
*Tuesday, May 14, 2013 at 8:05pm by bobpursley*

**Physics**

A 28 kg canoe has a 24 kg passenger. The passenger is 2.0 m from the left end of the canoe and the center of mass of the canoe by itself is 2.9 m from the left end. a. Calculate the position of the center of mass of the canoe/passenger system. b. if we neglect any horizontal ...
*Sunday, October 21, 2012 at 2:33pm by Ezek*

**Physics**

Two stars in a binary system orbit around their center of mass. The centers of the two stars are 7.80 x 10^11 m apart. The larger of the two stars has a mass of 3.50 x 10^30 kg, and its center is 3.00 x 10^11 m from the system's center of mass. What is the mass of the smaller ...
*Monday, October 24, 2011 at 4:40pm by Anne*

**physics! center of mass**

a long non uniform board of length 8 m and mass m = 12 kg is suspended by two ropes if the tensions in the ropes are mg/3 (on left) and 2mg/3 (on right) what is the location of the board's center of mass thank you!
*Thursday, October 7, 2010 at 2:21pm by liz*

**physics! center of mass**

a long non uniform board of length 8 m and mass m = 12 kg is suspended by two ropes if the tensions in the ropes are mg/3 (on left) and 2mg/3 (on right) what is the location of the board's center of mass thank you!
*Thursday, October 7, 2010 at 3:15pm by liz*

**Physics**

Two balls are approaching each other head on. Their velocities are + 9.55 and -11.0 m/s (a) Determine the velocity of the center of mass of the two balls if they have the same mass. (b) Determine the velocity of the center of mass of the two balls if the mass of one ball(v=9....
*Friday, March 2, 2007 at 1:31am by Cavin*

**Physics Classical Mechanics**

The mean distance from the center of the earth to the center of the moon is rem = 3.84 × 108 m. The mass of the earth is me = 5.98 × 1024 kg and the mass of the moon is mm = 7.34 × 1022 kg. The mean radius of the earth is re = 6.37 × 106 m. The mean radius of the moon is rm = ...
*Monday, October 28, 2013 at 6:10am by Anonymous*

**physics**

Compute the force of attraction between a 25 kg. mass and a 45 kg. mass that are 9.6 meters apart from center to center.
*Monday, January 20, 2014 at 1:12am by Marina*

**physics**

two planets of masses "m" and "M" respectively. have a center to center separation of "R".At what distance from the center of the planet of mass"M" do the gravitational force of planets cancel each other?????
*Thursday, April 26, 2012 at 6:35am by hameed ehsan*

**physics**

two planets of masses "m" and "M" respectively. have a center to center separation of "R".At what distance from the center of the planet of mass"M" do the gravitational force of planets cancel each other????? help me plzzz??????
*Monday, April 30, 2012 at 1:07am by m sani*

**College physics - Center of mass**

College Physics- Center of Mass? The objects in the figure below are constructed of uniform wire bent into the shapes shown (Figure 1) . Each peice has a length of 0.15 . There are two objects that we need to figure out the x- and y-coordinates of the center of mass of the ...
*Wednesday, October 10, 2012 at 11:39pm by Herosugar*

**physics**

A thin, light string is wrapped around the rim of a 4.00kg solid uniform disk that is 30.0cm in diameter. A person pulls on the string with a constant force of 100N tangent to the disk. Find the linear acceleration of its center of mass. If the disk is replaced by a hollow ...
*Saturday, April 12, 2008 at 10:18pm by Erin*

**Physics**

To determine the location of his center of mass, a physics student lies on a lightweight plank supported by two scales L = 2.40 m apart If the left scale reads 278 N, and the right scale reads 116 N, calculate the student's mass. Calculate the distance from the student's head ...
*Friday, March 4, 2011 at 5:31pm by Megan*

**physics**

To determine the location of his center of mass, a physics student lies on a lightweight plank supported by two scales L = 2.44 m apart. If the left scale reads 309 N, and the right scale reads 125 N, calculate the student's mass. Calculate the distance from the student's ...
*Sunday, October 21, 2012 at 4:38pm by Emily *

**physics**

A uniform, square metal plate with side L = 3.50 cm and mass 0.087 kg is located with its lower left corner at (x, y) = (0, 0) as shown in the figure. Two squares with side length L/4 are removed from the plate. (a) What is the x-coordinate of the center of mass? (b) What is ...
*Sunday, March 6, 2011 at 2:57pm by Anonymous*

**Physics**

1.4 is the distance between the center of the plank (its center of mass) and right support. 1.4 = (5/2)-1.1
*Wednesday, July 11, 2012 at 3:20pm by Elena*

**Physics - Satellites**

Actually, it is not. Both the satellite and Earth will rotate about a common center of gravity. However, the center of Earth and that center of rotation has a nin distance, because of the Mass of the Earth. Keplers Laws apply.
*Monday, March 24, 2008 at 1:51am by bobpursley*

**Physics - Center of Mass**

The density of a 5.0-m long rod can be described by the linear density function λ(x) = 145 g/m + 14.2x g/m2. One end of the rod is positioned at x = 0 and the other at x = 5 m. a) Determine the total mass of the rod. b) Determine the center-of-mass coordinate.
*Saturday, June 16, 2012 at 7:43pm by Joe*

**Physics(please help)**

The center of mass of the upper rod is at (x1,y1) =(0, 4.15) The center of mass of the left rod is at (x2,y2) =(- 4.15, 0) The center of mass of the lower rod is at (x3,y3) =(0, - 4.15) L = 8.3 m Coordinates of the center of mass of the 3-rod-system are x =(x1•L +x2•L+x3•L)/3•...
*Sunday, June 3, 2012 at 2:19pm by Elena*

**physics**

A rod of length 39.0 cm has linear density (mass-per-length) given by the following equation, where x is the distance from one end. ë = 50.0 g/m + 21.0x g/m2 (a) What is its mass? (b) How far from the x = 0 end is its center of mass? I think you would plug in the 39cm for the ...
*Sunday, March 22, 2009 at 9:03pm by mightymouse*

**physics**

Same answer to all three questions. It is the center of mass that newton's First and Second laws apply to. In question One there is no external force or moment, so the linear and angular momentums remain constant. In question 2 the center of mass of the projectile continues ...
*Saturday, July 10, 2010 at 3:24pm by Damon*

**Physics**

How far is the center of mass of the Earth-Moon system from the center of the Earth? The Earth's mass is 5.97×1024 kg, the Moon's mass is 7.4×1022 kg, and the distance between their centers is 3.8×108 m.
*Monday, June 4, 2012 at 12:57pm by Jamie*

**Physics**

2. A square of side is removed from one corner of a square sandwich that has sides of length L. The center of mass of the remainder of the sandwich moves from C to C’. The displacement of the x coordinate of the center of mass (from C to C’) is
*Thursday, April 2, 2009 at 10:40am by Anonymous*

**Physics**

How far is the center of mass of the Earth-Moon system from the center of the Earth? The Earth's mass is 5.97e24 Kg, the Moon's mass is 7.4e22 Kg, and the distance between their centers is 3.8e8m.
*Friday, December 7, 2012 at 12:35pm by Osamudiamen*

**Physics**

A sheet of siding has a centrally-located doorway of width 2.0 m and height 6.0 m cut out of it. The sheet, with the doorway hole, has a mass of 264 kg. (a) What is the x coordinate of the center of mass? (b) What is the y coordinate of the center of mass? Assume the lower ...
*Sunday, June 3, 2012 at 11:34am by Amanda*

**physics**

How big is the cut-off piece? You would need to that it most cases. (Not this time, however) I think they want the Center of Mass, not the "Central Mass" -- whatever that is. You also probably meant "off corners A and C" instead of "of corners O and C". There IS no corner at O...
*Thursday, January 6, 2011 at 12:06pm by drwls*

**Physics**

L1 and L2 are not forces; they describe locations where forces are applied. Between what points are the lengths L measured? Where is the person's center of mass? I can visualize the problem but not the notation you are using. The sum of the forces on arms and legs equals the ...
*Friday, April 4, 2008 at 8:13pm by drwls*

**mechanics**

The center of area of a circle is the center of the circle by symmetry. The center is also the center of mass if the material is of uniform thickness and density.
*Sunday, July 17, 2011 at 1:51pm by Damon*

**Physics**

John’s mass is 81.0 kg, and Barbara’s is 62.4 kg. He is standing on the x axis at xJ = +9.41 m, while she is standing on the x axis at xB = +4.34 m. They switch positions. How far and in which direction does their center of mass move as a result of the switch? Distance moved ...
*Wednesday, November 7, 2012 at 4:44pm by Orla*

**Physics**

A star of mass 2.0 1028 kg that is 1.6 1020 m from the center of a galaxy revolves around that center once every 3.4 108 years. Assuming that this star is essentially at the edge of the galaxy, each of the stars in the galaxy has a mass equal to that of this star, and the ...
*Friday, February 16, 2007 at 4:30pm by winterWX*

**Physics**

A round body of mass M, radius R, and moment of inertia I= BMR^2 is rolling without slipping. Its kinetic energy can be decomposed into the energy of its center of mass motion (translation) and the enrgy of rotation about its center of mass. The fractions of the body's kinetc ...
*Tuesday, May 10, 2011 at 9:45pm by Jason*

**Physics**

A round body of mass M, radius R, and moment of inertia I= BMR^2 is rolling without slipping. Its kinetic energy can be decomposed into the energy of its center of mass motion (translation) and the enrgy of rotation about its center of mass. The fractions of the body's kinetc ...
*Tuesday, May 10, 2011 at 11:52pm by Jason*

**Physics**

A round body of mass M, radius R, and moment of inertia I= BMR^2 is rolling without slipping. Its kinetic energy can be decomposed into the energy of its center of mass motion (translation) and the enrgy of rotation about its center of mass. The fractions of the body's kinetc ...
*Wednesday, May 11, 2011 at 10:58am by Jason*

**physics**

A bullet with mass m and a velocity of v is shot perpendicular to the edge of a uniform rod with length L and mass 4m which is free to move and rotate on a frictionless horizontal surface. The bullet is lodged into the rod and move together after the collision. a) Calculate ...
*Wednesday, July 21, 2010 at 12:39pm by Anonymous*

**physics**

A suspension bridge supported by a cable 100ft long has a sag of 10ft at its center. If the bridge has a weight of 20,000 lbs and its center of mass is the center of the bridge, what is the tension on the cable?
*Monday, January 17, 2011 at 11:40pm by bird*

**physics Only one part left !!!!!! PLZ HELP**

A uniform, square metal plate with side L = 3.50 cm and mass 0.087 kg is located with its lower left corner at (x, y) = (0, 0) as shown in the figure. Two squares with side length L/4 are removed from the plate. (a) What is the x-coordinate of the center of mass? = L/2 (b) ...
*Monday, March 7, 2011 at 10:27am by HELP!!!!*

**physics Only one part left !!!!!! PLZ HELP**

A uniform, square metal plate with side L = 3.50 cm and mass 0.087 kg is located with its lower left corner at (x, y) = (0, 0) as shown in the figure. Two squares with side length L/4 are removed from the plate. (a) What is the x-coordinate of the center of mass? = L/2 (b) ...
*Monday, March 7, 2011 at 10:27am by HELP!!!!*

**physics**

Let X be the distance of the brick from the center of mass of the person. Set the total moment about the brick equal to zero and solve for the unknown X. 30kg*1.56 m - 15kg*0.78 m - X*62kg = 0 (0.78 m is the location of the center of mass of the uniform board)
*Wednesday, January 25, 2012 at 5:54pm by drwls*

**physics**

Consider the earth following its nearly circular orbit (dashed curve) about the sun.(Figure 2) The earth has mass mearth=5.98×1024kg and the sun has mass msun=1.99×1030kg. They are separated, center to center, by r=93millionmiles=150millionkm.
*Wednesday, November 27, 2013 at 11:59pm by Anonymous*

**physics**

A star of mass 2.0 1031 kg that is 4.8 1020 m from the center of a galaxy revolves around that center once every 4.2 108 years. Assuming that this star is essentially at the edge of the galaxy, each of the stars in the galaxy has a mass equal to that of this star, and the ...
*Friday, July 16, 2010 at 7:26pm by Sam*

**Physics**

A spaceship of mass m travels from the Earth to the Moon along a line that passes through the center of the Earth and the center of the Moon. (a) At what distance from the center of the Earth is the force due to the Earth five times the magnitude of the force due to the Moon? ...
*Tuesday, October 6, 2009 at 6:37pm by jawn*

**physics**

since the masses are equal, and at equal distances from the center of the square, the center of mass is the center of the square.
*Friday, October 12, 2012 at 11:47am by Steve*

**Physics**

The uniform sheet of siding shown has a centrally-located doorway of width 2.0 m and height 6.0 m cut out of it. The sheet, with the doorway hole, has a mass of 264 kg. (a) What is the x coordinate of the center of mass? (b) What is the y coordinate of the center of mass? ...
*Monday, June 4, 2012 at 12:56pm by Jamie*

**Physics**

You know the mass of earth, and a well known principle (accept it) that for symetrical distributions, you can consider that mass at the center of a sphere. g=G*Mass/r^2
*Tuesday, September 17, 2013 at 8:01am by bobpursley*

**physics**

Let: m = a small mass M = mass of the earth r = distance from the center of mass m to the earth's center. Constants: G = 6.67x10^-11 m^3/kg.s^2. M = 5.98x10^24 kg R = 6.38x10^6 m (Earth's radius) Law Of Gravitation: F = GmM/r^2 F = m(GM/r^2) = mg GM/r^2 = 3.00 m/s^2 Solve for ...
*Saturday, December 6, 2008 at 6:43pm by GK*

**Physics**

If the create has a mass of 90 kg and is 1.6 {\rm m} tall and 0.80 {\rm m} in depth and width, what is the minimum force needed to make the crate start tipping? (Assume the center of mass of the crate is at its center and static friction great enough to prevent slipping.)
*Sunday, November 28, 2010 at 6:54pm by Danny*

**Physics(please help)**

Four very thin rods, each 8.3 m long, are joined to form a square. The center of mass of the square is located at the coordinate origin. The rod on the right is then removed. What are the x- and y-coordinates of the center of mass of the remaining three-rod system? I have no ...
*Sunday, June 3, 2012 at 2:19pm by Hannah*

**physics**

A solid uniform sphere has a mass of 7.0 104 kg and a radius of 1.2 m. (a) What is the magnitude of the gravitational force due to the sphere on a particle of mass m = 0.7 kg located at a distance of 2.1 m from the center of the sphere? N (b) What if it is 1.0 m from the ...
*Friday, July 16, 2010 at 7:22pm by Sam*

**A physics question**

I was researching amusement park rides for a recent project (from this site I have noticed that many others are in the same boat as me). Anywho, I am doing the Ferris wheel or the Giant Wheel, and I was wondering if this was right, with respect to potential energy: this is due...
*Friday, November 2, 2007 at 10:29pm by Nessa*

**Physics**

The density of a 5.0-m long rod can be described by the linear density function λ(x) = 140 g/m + 14.8x g/m2. One end of the rod is positioned at x = 0 and the other at x = 5 m. (a) Determine the total mass of the rod. (b) Determine the center-of-mass coordinate. I found ...
*Monday, June 11, 2012 at 7:14pm by James*

**Physics**

a 32 kg child stands at the edge of a circular platform that rotates at w=2rad/s about its center. Mass of platform=60kg, radius=2m. The child walks from the rim towards the center. Find the Angular speed when the child reaches a point 0.500 m from the center.
*Friday, December 14, 2012 at 4:35pm by Help!*

**Physics**

3. A spaceship of mass 175,000 kg travels from the Earth to the Moon along a line that passes through the center of the Earth and the center of the Moon. At what distance from the center of the Earth is the force due to the Earth twice the magnitude of the force due to the ...
*Sunday, February 24, 2013 at 12:12pm by Meder*

**Physics**

A spaceship of mass 175,000 kg travels from the Earth to the Moon along a line that passes through the center of the Earth and the center of the Moon. At what distance from the center of the Earth is the force due to the Earth twice the magnitude of the force due to the Moon? ...
*Sunday, February 24, 2013 at 12:35pm by Meder*

**phy.**

2) Isn't gravity force= GMm/d^2 3) Where is the center of mass for Earth/Moon. ISn't the center of mass what they both rotate around?
*Tuesday, October 16, 2007 at 8:34pm by bobpursley*

**Physics HELLLPPPP**

-The distribution of mass in the earth is spherically symmetric. Yes, if all the mass were under Paris, g would be very high there. -The density of the earth is the same everywhere. No, all the mass could be at the center -The earth's interior is solid everywhere. No, again ...
*Friday, January 25, 2013 at 4:16pm by Damon*

**center of mass**

to find the center of mass, you add up all of the x-points * all of their corresponding masses. (e.g. sum x*m) and you divide it by the sum of all of the masses (e.g. sum m) therefore (sum x*m)/(sum m). you are looking for where to place x to make the center of mass at the ...
*Sunday, March 27, 2011 at 2:43pm by sean*

**physics/calculus**

I need help in calculating work. following quantites are given. * G: 6.67E-11 *Mass of earth:5.98E24 *mass of satelightt:80kg *x(initial) center of the earth-7E6 m *x(final) center of the earth 12E6 m How do I make integral equation I need use 20 interval.
*Monday, April 7, 2014 at 1:04am by jenny*

**physics**

A high jumper wants to clear the bar at 2.1m. To do so he needs to raise his center of mass to a height of 2.4m. Assuming that air resistance can be neglected and his center of mass is 1.1m above the ground at take-off, determine the required vertical take-off speed.
*Saturday, March 24, 2012 at 9:47pm by jamie*

**Physics**

5. A circular pizza of radius R has a circular piece of radius R/3 removed from one side. The center of mass of the pizza with the hole is at a distance of_____ from the center of mass of the original pizza. A. R/20 B. R/2 C. R/30 D. R/3 E. R/12 The answer is E, but why is it ...
*Saturday, June 16, 2012 at 9:50pm by James*

**Physics**

The Hubble Space Telescope (HST) has recorded evidence of a black hole at the center of the M87 galaxy. Using Doppler data, it's been measured that matter is orbiting the center of this galaxy at an orbital speed of 7.5x10 5 m/s, out at a radius of 5.7x10 17 m. Calculate the ...
*Thursday, July 26, 2012 at 12:00pm by Zac*

**Physics**

An trapdoor is 0.91 m square, has a mass of 11 kg, and is hinged along one side with a latch on the opposite side. If the center of mass is located 0.1 m toward the hinged side from the center, what are the magnitudes of the forces on the latch and the hinge from the door?
*Sunday, April 28, 2013 at 7:35pm by Ben*

**phy**

Find the center of mass of the three mass system that m1 = 1.90 kg and m2 = 1.30 kg. Specify relative to the center of the left hand (1.00 kg) mass.
*Thursday, October 7, 2010 at 7:00pm by ami*

**Physics**

Let V be the velocity. Assume the earth's velocity is much larger and that the moon goes around the Earth at the center. Actually, both revolve about the center of mass of the pair, at a speed that depends upon the sum of the masses. Let M be the Earth's mass. R = 3.9*10^8 m G...
*Friday, December 16, 2011 at 10:37am by drwls*

**Physics please help**

How far from the center of the Earth (in km) is the center of mass of the Earth + satellite system if the satellite has a mass of 6560 kg and is in orbit 46200 km above the surface of the Earth. The mass of the Earth is 5.98 * 10^24 kg and the radius of the Earth is 6370 km.
*Monday, November 14, 2011 at 8:49pm by Me*

**physics**

Not knowing the center of gravity, lets look at energy. Assume the distance from the piviot point to the center of mass is r. Then the distance the mass fell is 2r, and the PE lost is 2rmg.the KE at the bottom is 1/2 m v^2, and they are equal 1/2 m v^2=2rmg r= 1/4 v^2/g so, ...
*Friday, December 9, 2011 at 5:13pm by bobpursley*

**Physics**

for the center of mass asume that xm for rear wheel is zero so you just do center of mass = (x1m1+x2m2)/(m1+m2) let ur x2m2 be zero so plug ur number n finally subtract ur value from the length if the axles.
*Monday, October 24, 2011 at 11:43pm by keshabi*

**physics**

A basketball of mass 0.602 kg is passed to a player of mass 83.0 kg who jumps off the floor while catching the ball. The player's center of mass is instantaneously at rest just before he catches the ball, which is initially moving at a velocity of 11.5 m/s, directed 30.0° ...
*Thursday, November 29, 2012 at 10:32pm by Anthony*

**Physics - Center of Mass**

A 32-cm-by-32-cm checkerboard has a mass of 120 g. There are four 19-g checkers located on the checkerboard, as shown in the figure. Relative to the origin located at the bottom left corner of the checkerboard, where is the center of mass of the checkerboard-checkers system?
*Saturday, June 16, 2012 at 7:41pm by Newman*

**Physics help!**

How far from the center of the Earth (in km) is the center of mass of the Earth + satellite system if the satellite has a mass of 6560 kg and is in orbit 46200 km above the surface of the Earth. The mass of the Earth is 5.98 * 10^24 kg and the radius of the Earth is 6370 km
*Monday, November 14, 2011 at 3:00pm by Me*

**College physics - Center of mass**

1. On axis of symmetry midway between vertical wires and 0.05 m above bottom wire. 2. Along a 45 degree from the corner of the L. 0.0375 m to the right of and 0.0375 m above the corner. 3. At the center of the triangle. (The center of symnmetry where the angle bisectors ...
*Wednesday, October 10, 2012 at 11:39pm by drwls*

**college physics help please...**

The location of the center of mass of the partially eaten, 11 inch diameter pizza (r = 5.5) shown in Figure 9-20 is Xcm = -1.1 in. and Ycm = -1.1 in. Assuming each quadrant of the pizza to be the same, find the center of mass of the uneaten pizza above the x axis (that is, the...
*Sunday, October 19, 2008 at 5:01pm by sally*

**physics**

Three guns are aimed at the center of a circle,and each fires a bullet simultaneously. The directions in which they fire are 120 degrees apart. Two of the bullets have the same mass of 4.50*10^-3 kg and the same speed of 324 m/s. The other bullet has an unknown mass and a ...
*Wednesday, October 16, 2013 at 3:54am by Anonymous*

**Physics**

A stone is dropped at t = 0. A second stone, with 4 times the mass of the first, is dropped from the same point at t = 110 ms. (a) How far below the release point is the center of mass of the two stones at t = 410 ms? (Neither stone has yet reached the ground.) (b) How fast is...
*Tuesday, April 1, 2014 at 4:44pm by Patricia*

**physics**

Don't you mean the fulcrum was 36.75 cm from the end with the 200 g mass? Or do you mean the center of mass of meterstick and both weights (together) is at 36.75 cm? That would also make sense. Whether it is balanced or not depends upon where the fulcrum is. The center of mass...
*Saturday, January 28, 2012 at 9:17pm by drwls*

**Physics**

Belinda needs to find the center of mass of a sculpture she has made so that it will hang in a gallery correctly. The sculpture is all in one plane and consists of various shaped uniform objects with masses and sizes as shown. The length of the rectangle is L = 1.4 m and the ...
*Sunday, March 18, 2012 at 4:34am by Priyanka*

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