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August 20, 2014

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Physics: Three Identical Masses
Three identical masses of 640 each are placed on the x axis. One mass is at = -100 , one is at the origin, and one is at = 400 . What is the magnitude of the net gravitational force on the mass at the origin due to the other two masses? Take the gravitational constant to be = ...
October 3, 2011 by Erik

Physics
Four identical masses of 800kg each are placed at the corners of a square whose side length is 10.0cm. What is the net gravitational force (magnitude and direction) on one of the masses, due to the other three? I think I have to separate the four masses but I'm not sure how to...
January 20, 2009 by Jaime

Physics
Four identical masses of mass 900 kg each are placed at the corners of a square whose side lengths are 15.0 cm. What is the magnitude of the net gravitational force on one of the masses, due to the other three?
April 12, 2012 by Joe

physics
Four identical masses of mass 800kg each are placed at the corners of a square whose side lengths are 15.0cm . What is the magnitude of the net gravitational force on one of the masses, due to the other three?
April 14, 2014 by name

physics
Four identical masses of 2.6 kg each are located at the corners of a square with 1.5 m sides. What is the net force on any one of the masses?
November 6, 2009 by Anonymous

physics
Four identical masses of 2.7 kg each are located at the corners of a square with 1.4 m sides. What is the net force on any one of the masses?
December 19, 2010 by melissa

physics
Four identical masses of 3.4 kg each are located at the corners of a square with 1.5 m sides. What is the net force on any one of the masses?
January 4, 2011 by bobby

physics
Four identical masses of 3.5 each are located at the corners of a square with 1.8 sides. Part A What is the net force on any one of the masses?
September 29, 2012 by sammy

physics
Four identical masses of 2.7 kg each are located at the corners of a square with 1.4 m sides. What is the net force on any one of the masses? F=((G)(m1)(m2))/r^2 I don't understand why im not getting it right... i need help please!!
December 19, 2010 by lissa

Physics
Three identical masses of 700 each are placed on the x axis. One mass is at = -100 , one is at the origin, and one is at = 370 . What is the magnitude of the net gravitational force on the mass at the origin due to the other two masses? Take the gravitational constant to be = ...
February 7, 2013 by Tamar

physics
Three identical masses of 500 kg each are placed on the x axis. One mass is at x_1 = -11.0 cm, one is at the origin, and one is at x_2 = 37.0 cm. What is the magnitude of the net gravitational force F_grav on the mass at the origin due to the other two masses? Take the ...
October 11, 2010 by lauren

Physics Help!!
Three identical masses of 500 kg each are placed on the x axis. One mass is at x_1 = -11.0 cm, one is at the origin, and one is at x_2 = 37.0 cm. What is the magnitude of the net gravitational force F_grav on the mass at the origin due to the other two masses? Take the ...
October 11, 2010 by LIZ

Physics
Two identical +9.0 C point charges are initially spaced 5.2 cm from each other. If they are released at the same instant from rest, how fast will they be moving when they are very far away from each other? Assume they have identical masses of 1.0 mg.
February 25, 2012 by Jon

physics
Three masses are arranged on a flat surface as shown. Two of the masses are as follows: m2 = 16.3 kg and m3 = 66.5 kg. A horizontal force of 519 N applied to m2 accelerates the masses across the floor, which has a coefficient of friction of μ = 0.312, at 1.77 m/s2. What ...
December 5, 2010 by dillon

physics
Two identical +9.5uF point charges are initially 3.5cm from each other. If they are released at the same instant from rest, how fast will each be moving when they are very far away from each other? Assume they have identical masses of 2.0mg
March 8, 2013 by Steve

physics
Two identical +9.5uF point charges are initially 3.5cm from each other. If they are released at the same instant from rest, how fast will each be moving when they are very far away from each other? Assume they have identical masses of 2.0mg (P.s. I am not in calculus) so the ...
March 8, 2013 by Steve

Physics
Calculate the gravitational force between two identical 100-kg masses separated by 1 m.
March 4, 2012 by Mina

physics
If two different masses have the same kinetic energy, their momenta are: 1. inversely proportional to their masses 2. inversely proportional to the square roots of their masses 3. proportional to the squares of their masses 4. proportional to their masses 5. proportional to ...
October 28, 2011 by Anonymous

physics
Two equal masses are attached to separate identical springs next to one another. One mass is pulled so its spring stretches 20 {\rm cm} and the other is pulled so its spring stretches only 10 {\rm cm}. The masses are released simultaneously.Which mass reaches the equilibrium ...
December 13, 2010 by leya

Physics
Three identical balls, with masses M, 2M, and 3M are fastened to a massless rod of length L as shown. The rotational inertia about the left end of the rod is: Thats the layout below. Would calculus be needed in this problem (intergration) because then Im in trouble. I know the...
December 9, 2006 by tatiana

Physics
Three particles have identical masses and identical inital velocities. These particles are projected one at a time into a region in which there is a uniform magnetic field B perpendicular to their velocities. If two of the particles are deflected in opposite directions and the...
April 21, 2008 by Andrea

Science
Three masses sitting on three pulleys,the masses are 5kg,9kg,8kg.the system is in equilibrium,the pulleys are frictionless & massless
October 14, 2013 by Samar

Physics
A single mass (m1 = 3.2 kg) hangs from a spring in a motionless elevator. The spring constant is k = 253 N/m. 1) What is the distance the spring is stretched from its unstretched length? This first answer is equal to 12.4 cm but I am having trouble on the second question... 2)...
February 21, 2014 by Cam

Physics
A 1.00 g mass hangs by a string next to an identical stationary mass. When both masses are given identical positive charges, the hanging charge swings out 3.00 cm from the vertical so that its string makes an angle of 30.0 degrees with the vertical. Find the magnitude of the ...
June 13, 2007 by Katie

physics
A stationary mass of 10 kg disintegrates explosively, with the evolution of 4.2*10^5 J, into three parts, two having equal masses of 3 kg. These two masses move at right angles to each other. Calculate the speed of the third part.
January 16, 2012 by rikki

Physics help please!
The three 500 g masses in the daigram are connected by massless, rigid rods to form a triangle. What is the triangle's rotational energy (in J) if it rotates at 1.50 rev/s about an axis through the center? (Diagram shows equilateral triangle with 500g masses at each point, the...
November 14, 2011 by Me

Physics
If two different masses have the same kinetic energy, their momenta are: a. proportional to the squares of their masses b. proportional to their masses c. proportional to the square roots of their masses d. inversely proportional to their masses e. inversely proportional to ...
October 31, 2011 by Anonymous

math
a large jar contains 500 identical marbles. Suppose you have an identical empty jar, a set of standard masses and balance scales. How would you find the mass of one marble without opening or breaking the jar? Explain Thanks for your help, this stumped me for sure.
April 8, 2009 by jillybean

Physics
Three masses that are 10 kg each are located at the corners of an equilateral triangle, with side length of 0.55m. What is the magnitude of the total force acting on one mass due to the other two masses? The answer is supposed to be 3.82e-08 N. Any help is appreciated. I'm not...
July 28, 2012 by James

Physics
The three 500 g masses in the daigram are connected by massless, rigid rods to form a triangle. What is the triangle's rotational energy (in J) if it rotates at 1.50 rev/s about an axis through the center? (Diagram shows equilateral triangle with 500g masses at each point, the...
November 14, 2011 by Please Help!

physics
Two identical 1.60 {\rm kg} masses are pressed against opposite ends of a spring of force constant 1.85 {\rm N}/{\rm cm}, compressing the spring by 25.0 {\rm cm} from its normal length.
December 23, 2011 by Anonymous

Physics
This question was posted earlier but the explanation given was confusing. The three 500 g masses in the daigram are connected by massless, rigid rods to form a triangle. What is the triangle's rotational energy (in J) if it rotates at 1.50 rev/s about an axis through the ...
November 14, 2011 by Me

Need help on Physics!!
Three uniform spheres are fixed at the positions shown in the diagram. Assume they are completely isolated and there are no other masses nearby. (a) What is the magnitude of the force on a 0.20 kg particle placed at the origin (Point P)? What is the direction of this force? (b...
March 31, 2014 by Nick

Physics
A long thin rod of mass M = 2:00 kg and length L = 75:0 cm is free to rotate about its center as shown. Two identical masses (each of mass m = .403 kg) slide without friction along the rod. The two masses begin at the rod's point of rotation when the rod is rotating at 10.0 ...
December 24, 2011 by Lindsay

Physics- Angular Momentum
A long thin rod of mass M=2.00 kg and length L=75.0 cm is free to rotate about its center. Two identical masses (each of mass m = .45kg) slide without friction along the rod. The two masses begin at the rod's point of rotation when the rod is rotating at 10.0 rad/s. A) When ...
December 28, 2010 by Miki

physic
Two equal masses are attached to separate identical springs next to one another. One mass is pulled so its spring stretches 20 cm and the other is pulled so its spring stretches only 10 cm. The masses are released simultaneously.Which mass reaches the equilibrium point first?
December 13, 2010 by leya

physics
Two masses are connected by a string. Mass A is on a flat roof and mass B is hanging over the edge of the roof. The mass on the roof is 15 kg and the hanging mass is 5 kg. The edge of the roof is 100 m above the ground. The two masses are initially at rest with the hanging ...
November 18, 2010 by Anna

Physics
Two masses m are attached to two vertices of an equilateral triangle made of three massless rods of length l. A pivot is located at the third vertex, and the triangle is free to swing back and forth in a vertical plane. If it is initially released from rest when one of the ...
October 10, 2012 by Anonymous

physics
Two ice skaters have masses m1 and m2 and are initially stationary. Their skates are identical. They push against one another, as in Figure 7.10, and move in opposite directions with different speeds. While they are pushing against each other, any kinetic frictional forces ...
October 15, 2011 by riley

Physics
Two ice skaters have masses m1 and m2 and are initially stationary. Their skates are identical. They push against one another, as shown below, and move in opposite directions with different speeds. While they are pushing against each other, any kinetic frictional forces acting...
April 1, 2008 by Will

Physics
Two ice skaters have masses m1 and m2 and are initially stationary. Their skates are identical. They push against one another, as shown below, and move in opposite directions with different speeds. While they are pushing against each other, any kinetic frictional forces acting...
March 13, 2012 by Natasha

College Chem
If equal masses of O2 and N2 are placed in identical containers at the same temperature, which of the following statements is (are) true?
March 28, 2010 by Donna

physics
Two identical 1.60 {\rm kg} masses are pressed against opposite ends of a spring of force constant 1.85 {\rm N}/{\rm cm}, compressing the spring by 25.0 {\rm cm} from its normal length.Find the maximum speed of each mass when it has moved free of the spring on a smooth, ...
December 23, 2011 by Anonymous

Physics
Three identical small Styrofoam balls of mass 1.53 g are suspended from a fixed point by three nonconducting threads, each with a length of 56.4 cm and negligible mass. At equilibrium the three balls form an equilateral triangle with sides of 31 cm. What is the common ...
April 12, 2012 by John

physics
The masses of the earth and moon are 5.98x1024 and 7.35x1022 kg, respectively. Identical amounts of charge are placed on each body, such that the net force (gravitational plus electrical) on each is zero. What is the magnitude of the charge placed on each body?
February 10, 2011 by anto99999999999999999999999999

physics
The masses of the earth and moon are 5.98 1024 and 7.35 1022 kg, respectively. Identical amounts of charge are placed on each body, such that the net force (gravitational plus electrical) on each is zero. What is the magnitude of the charge placed on each body?
January 13, 2013 by Anonymous

Physics
A mobile consists of two very lightweight rods of length l = 0.400 m connected to each other and the ceiling by vertical strings. (Neglect the masses of the rods and strings.) Three objects are suspended by strings from the rods. The masses of objects 1 and 3 are m1 = 5.90 kg ...
June 22, 2012 by Luca

physics
Three blocks are located on a horizontal table. The coefficient of kinetic friction between the blocks and the table is 0.276. They are connected by a massless cord, as shown in the figure below, and pulled to the right. The masses of the three blocks are = 9.0 kg, = 0.5 kg, ...
February 13, 2008 by shelby

College Physics
The masses of the earth and moon are 5.98 1024 and 7.35 1022 kg, respectively. Identical amounts of charge are placed on each body, such that the net force (gravitational plus electrical) on each is zero. What is the magnitude of the charge placed on each body?
January 10, 2013 by Anonymous

Biology
What is the probability that any two humans with the same parents will be identical (other than identical twins) to make an identical zygote?
October 17, 2012 by brenda Houchins

Physics
Two billard balls move toward one another.The balls have identical masses, and the collision is perfectly elastic. The initial velocity of the balls are +30 cm/s and -20 cm/s, what is the velocity of each ball after the collision?
December 2, 2012 by Renee

physics
The same amount of heat entering identical masses of different substances produces different temperature changes. Calculate the final temperature when 1.25 kcal of heat enters 1.25 kg of the following, originally at 20.0C. (a) water (b) concrete (c) steel (d) mercury
July 19, 2013 by Eric

physics - science
- two identical lead spheres have a combined mass of 12kg. the density of lead is 11400 kg m-3. find the radius of each sphere. calculate the gravitational force of attraction between the 2 spheres when they are touching. -two masses, one of 300g and one of 500g are placed ...
September 16, 2008 by ally

Please help me ASAP!!!
Three uniform spheres are fixed at the positions shown in the diagram. Assume they are completely isolated and there are no other masses nearby. (a) What is the magnitude of the force on a 0.20 kg particle placed at the origin (Point P)? What is the direction of this force? (b...
March 31, 2014 by Eli

physics
Three masses are aligned along the x axis of a rectangular coordinate system so that a 2 kg mass is at the origin, a 3kg is at (2,0) m, and a 4 kg mass is at (4,0) m. Find (a) the gravitational force exerted on the 4 kg mass by the other two masses and (b) the magnitude and ...
December 9, 2007 by Anonymous

physics
Three balls A, B, and C, with masses of 3 kg, 1 kg, and 1 kg, respectively, are connected by massless rods. What are the coordinates of the center of mass?
October 13, 2008 by Samuel

physics repost
Three masses are aligned along the x axis of a rectangular coordinate system so that a 2 kg mass is at the origin, a 3kg is at (2,0) m, and a 4 kg mass is at (4,0) m. Find (a) the gravitational force exerted on the 4 kg mass by the other two masses and (b) the magnitude and ...
December 9, 2007 by Anonymous

physics
A coil spring is extended by 4.4 cm when it supports a 1.00- N weight. If an identical spring is joined to the end of the first one, what is the extension of the combined spring when it supports the same 1.00- N weight? Assume the spring masses to be negligible
December 4, 2012 by Courtney

college physics
three carts of masses 4.0kg, 10kg, and 3.0kg move on a frictionless horizontal track with speeds of 5.0m/s, 3.0m/s, and 4.0m/s. The carts stick together after colliding. find the velocity of the three carts.
June 1, 2008 by sarah

physics
Concrete sidewalks are always laid in sections, with gaps between each section. For example, the drawing shows three identical 2.4-m sections, the outer two of which are against immovable walls. The two identical gaps between the sections are provided so that thermal expansion...
July 25, 2013 by justin

physics
Three carts of masses 5 kg, 12 kg, and 3 kg move on a frictionless horizontal track with speeds of 5 m/s, 8 m/s, and 4 m/s, as shown in figure. The carts stick together after colliding. 5 kg 12 kg 3 kg 5 m/s 8 m/s 4 m/s Find the final velocity of the three carts. ...
February 1, 2012 by ntirandekura

chm
Why are the atomic masses listed in the periodic table not whole numbers? Answer Scientists have yet to make the precise measurements. That would be too much of a coincidence. ??>>The atomic masses are average atomic masses. or >>Today's instruments are able to ...
February 23, 2013 by jj

physics
1.Three masses, m1, m2, and m3, are lying on a plane without friction and are connected by a string. A force F is applied to the mass m1 so that the whole system accelerates along a straight line. What is the tension of the string T between the masses m1 and m2? What is the ...
May 3, 2011 by Sandhya

Physics
An object with a mass of 20.1 kg is hung from two identical springs vertical. The springs both stretch 0.23 meters from equilibrium with the attached mass. One of the those springs is placed on a horizontal surface without friction and the mass of 20.1 kg is held still next to...
November 15, 2012 by Chelsea

Angular Momentum
A long thin rod of mass M = 2.00 kg and length L = 75.0 cm is free to rotate about its center as shown. Two identical masses (each of mass m = .421 kg) slide without friction along the rod. The two masses begin at the rod's point of rotation when the rod is rotating at 10.0 ...
July 11, 2011 by jhay

Physics
Three identical charges of 50 micro C are arranged at the points of an equilateral triangle 2 meters on a side. What is the net force on each charge?
March 21, 2008 by Maria Lewis

physics
Three particles, each of mass 3.0 kg, are fastened to each other and to a rotation axis by three massless strings, each 0.360 m long, as shown in the Figure. The combination rotates around the rotation axis with an angular velocity of 19.0 rad/s in such a way that the ...
March 16, 2012 by Katie

Physics
Two billiard balls with identical masses and sliding in opposite directions have an elastic head-on collision. Before the collision, each ball has a speed of 20 cm/s. Find the speed of each billiard ball immediately after the collision.
April 20, 2011 by Elizabeth

physics
Two billiard balls with identical masses and sliding in opposite directions have an elastic head-on collision. Before the collision, each ball has a speed of 20 cm/s. Find the speed of each billiard ball immediately after the collision.
October 23, 2013 by Tejas Sardar

math
a ball balances nine 10-gram masses and three 5-gram masses. what is the mass of the ball?
March 22, 2009 by Ryan

Physics
Three identical charges of 2.0 uC are placed at the vertices of an equilateral triangle, 0.15m on a side. Find the net force acting on each angle.
February 22, 2012 by Brandon

physics
Three blocks are located on a horizontal table. The coefficient of kinetic friction between the blocks and the table is 0.276. They are connected by a massless cord, as shown in the figure below, and pulled to the right. The masses of the three blocks are = 9.0 kg, = 0.5 kg, ...
February 12, 2008 by shelby

Science: Physics and Chemistry
I was given a systems equation. Two masses are on a flat frictionless surface tied together. There is a pulley type thing and another mass is hanging over the edge of the table. It is attatched to the other 2 masses. It has no Fn, only Fg because it is hanging. So I draw lines...
February 8, 2010 by Marina

Physics
Three blocks are located on a horizontal frictionless table. They are connected by a massless cord, as shown in the figure, and pulled to the right. The masses of the three blocks are m1 = 22 kg, m2 = 21 kg, and m3 = 33 kg. The pulling force is equal to T3 = 53 N. What is the ...
September 23, 2012 by jameson

physics
Three boxes are connected by cords, one of which (mA) wraps over a pulley having negligible friction on its axle and negligible mass and two boxes (mB & mC) are hanging. The masses are mA = 22.0 kg, mB = 40.0 kg, mC = 16.0 kg. -When the assembly is released from rest, what is ...
February 8, 2007 by **chocolatekisses

Physics
The drawing shows three particles far away from any other objects and located on a straight line. The masses of these particles are mA = 363 kg, mB = 517 kg, and mC = 154 kg. Find the magnitude and direction of the net gravitational force acting on each of the three particles...
October 30, 2012 by Don

physics
Two masses are hung are connected by a light cord and hung from a frictionless pulley of negligible mad are shown. Mass m1=3.00kg and mass m2=2.00kg. When the two masses are released from rest, the resulting acceleration of the two masses?
March 28, 2014 by Kam

Physics (answers included)
Two mountains are 1.00 km apart. If their masses are identical (2.00 1010 kg), what is the force due to gravity between the mountains? Fg=(GMm)/ r^2 =(6.67x10^-11 N*m^2/kg^2)(1010kg) (1010kg)/ (1000m)^2 =6.80x10^-11 N But the possible answers are: 2.67x 10^4 N 1.33x 10^-6 N ...
November 22, 2009 by Jacob

Science: Physics and Chemistry
Can someone please help me with this??? I was given a systems equation. Two masses are on a flat frictionless surface tied together. There is a pulley type thing and another mass is hanging over the edge of the table. It is attatched to the other 2 masses. It has no Fn, only ...
February 8, 2010 by Marina

science[physics]
three masses 3kg,4kg,5kg are located at corners of an equilateral triangle of side 1m.locate the centre of mass of the system
October 19, 2012 by anmol

college physics
Three identical charges (q = +5.0mC) are along a circle with radius of 2.0m at angles of 30, 150, and 270 degrees. What is the the resultant electric field at the center?
July 31, 2010 by Cristina

Physics
A line of identical train cars collide inelastically. (They couple.) Three carts are initially coupled and moving at speed v: the rest are stationary. The three moving cars hit a fourth, then those four hit a fth, and so on. This continues until the speed of the "collection" ...
November 1, 2012 by NIck

physics
In,the,ideal,apperatus,m1=,2.0kg.What,is,m2,if,both,masses,are,at,rest?How,about,if,both,masses,are,moving,at,a,constant,velocity?
January 19, 2008 by melissa

physics
In the frictionless apparatus m1=1.7kg a)What is m2 if both masses are at rest? b) How about if both masses are moving at constant velocity?
April 11, 2010 by kanesha

physics
In the ideal apparatus m1=2.0 kg. What is m2 if both masses are at rest? How about if both masses are moving at constant velocity?
November 2, 2009 by tom

Physics
Is the mass of an atomic nucleus greater or less than the sum of the masses of the nucleons composing it? Why don't the nucleon masses add up to the total nuclear mass?
April 25, 2008 by Lee

Physics
Three objects with masses m1= 36.5 kg m2= 19.2 kg m3= 12.5 kg Are hanging from massless ropes that run over a frictionless pulleys. If the system is released from rest, what is the magnitude of the acceleration in m/s^2 of mass m1? ___________________ O O O I I I I I I I I I I...
January 16, 2014 by Holly

Physics
Three objects with masses m1= 36.5 kg m2= 19.2 kg m3= 12.5 kg Are hanging from massless ropes that run over a frictionless pulleys. If the system is released from rest, what is the magnitude of the acceleration in m/s^2 of mass m1? ___________________ O O O I I I I I I I I I I...
January 16, 2014 by Holly

physics
three identical blocks are pulled on a horizontal frictionless surface. if the tension in the rope held by the habd is 30N what is the tension in the other ropes?
February 2, 2011 by joy

Physics
three masses are suspended from a meter stick as shown. How much mass must be suspended on the right side for the system to be in equilibrium?
July 4, 2011 by Faith

physics
The figure below shows two objects with masses m and M which are connected with a taut string running over a pulley. The pulley rotates without friction. The two masses are given as M = 393 g and m = 181 g. A second taut string connects the heavier object vertically from the ...
September 27, 2009 by m2a2

physics
Three identical point charges A, B, and C are located in the shape of an equilateral triangle with sides of length 15 cm. What is the net force on B if each charge has a magnitude of −5.0 10−3 C?
June 8, 2014 by grey

Physics
Consider two masses m1 and m2 connected by a thin string. Assume the following values: m1 = 4.18 kg and m2 = 1.00 kg. Ignore friction and mass of the string. 1) what is the acceleration of the 2 masses? 2)What should be the value of mass m1 to get the largest possible value of...
September 1, 2011 by Logan

Math-Algebra
1. Finf the width of a rectangle whose area is 36 sq in. And length is 9in. 2. The attraction F of any two masses m1 and m2 foe each other varies directly as the oroduct of the masses and inversely as the square of the distance d between these teo masses. Express the relation ...
November 24, 2013 by Mckenna Louise

physics
Three objects -- two of mass m and one of mass M -- are located at three corners of a square of edge length l. Find the gravitational field g at the fourth corner due to these objects. (Express your answers in terms of the edge length l, the masses m and M, and the ...
April 16, 2011 by mary

physics
Three objects -- two of mass m and one of mass M -- are located at three corners of a square of edge length l. Find the gravitational field g at the fourth corner due to these objects. (Express your answers in terms of the edge length l, the masses m and M, and the ...
April 16, 2011 by mary

physics
Three identical spheres of mass M are placed at the corners of eqvilateral triangle of sides 2m taking one of the corner as origin the position vector of the centre of mass is
February 25, 2012 by Anonymous

physics
Find the acceleration (mls^2) of the masses, given that m1= 1.0kg, m2= 2.0kg and m3= 3.0kg . Assume the table is frictionless and the masses move freely.
November 11, 2010 by jay

Physics
Three objects with masses m1 = 36.3 kg, m2 = 17.7 kg, and m3 = 11.1 kg are hanging from ropes that are redirected over pulleys. What is the acceleration of m1? Negative numbers for downward, and positive numbers for upward, please.
March 14, 2011 by Ebu

Physics
Three balls with masses of 4 g, 6 g, and 4 g,respectively, are connected by massless rods. The balls are located (in meter intervals).What is the x-coordinate of the center of mass? Answer in units of m
March 31, 2012 by Amber

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