Monday

April 21, 2014

April 21, 2014

Number of results: 116,801

**Physics - Newton's Law of universal gravitation**

Describe how Newton used each of the following phenomena to support the law of universal gravitation a) the orbit of the moon b) kepler's third law
*Sunday, August 22, 2010 at 2:38pm by Shaila*

**Physics**

This is only one step - The Universal Law of Gravitation F=G• m•M/(R)² R= 8.00 X 10^7 m, m=62 kg
*Monday, June 11, 2012 at 2:53pm by Elena*

**6th grade science (physics)**

Try here: http://search.yahoo.com/search?fr=mcafee&p=Law+of+Universal+Gravitation+in+relation+to+force%2C+mass+%26+distance Sra
*Sunday, April 18, 2010 at 12:26pm by SraJMcGin*

**6th grade science (physics)**

explain and describe Law of Universal Gravitation in relation to force, mass and distance
*Sunday, April 18, 2010 at 12:26pm by Tyler*

**science**

Explain the law of universal gravitation
*Tuesday, January 10, 2012 at 12:39am by glenn*

**6th grade science**

What is the universal law of gravitation?
*Thursday, March 18, 2010 at 9:28pm by mary*

**Science**

What is the best definition for The law of universal gravitation ?
*Monday, January 16, 2012 at 12:04pm by Jim*

**physic**

Which of these is not a statement of newton's law of universal gravitation?
*Friday, February 7, 2014 at 6:05pm by femi*

**science**

how does mass differ from weight what is law of universal gravitation
*Monday, October 26, 2009 at 4:14pm by dai*

**Science**

the product of the two objects’ mass. sources The Law of Universal Gravitation.
*Wednesday, October 30, 2013 at 10:05pm by Marcos*

**science**

what is the 3 laws of motion? & what is the law of universal gravitation plz answer thx in advance
*Tuesday, January 22, 2008 at 5:58pm by sammy*

**science **

what factors affect the friction forces between two surfeces 2a what is the law of universal gravitation
*Tuesday, October 20, 2009 at 8:57pm by sophie*

**physics**

can someone please help me with this question quick... Which of the following equations expresses Newton's law of universal gravitation? a. Fc=MVt^2/r b. Fg=M1M2/r c. g=Gme/r^2 d. Fg=Gmme/r^2 i really need help..thanks:-)
*Friday, February 20, 2009 at 5:45pm by Bella*

**physics(universal law of gravitation)**

The earth's radius is about Re = 6.4*10^6 m. At 2*10^6 m above the surface, you are R = 8.4*10^6 m from the center of the Earth. The acceleration of gravity is reduced by a ratio (6.4/8.4)^2 = 0.58 and g is reduced to g'= 5.7 m/s^2 The potential energy (relative to the ground...
*Thursday, January 14, 2010 at 10:11pm by drwls*

**Physics**

Based on Newton's law of universal gravitation, F=GMm/r² which means that the weight would be inversely proportional to the square of the distance from the centre of the Earth. If H is the altitude when the weight becomes 3/4 of what's on the surface, then (re/(re+H))^2=3...
*Saturday, October 3, 2009 at 11:05am by MathMate*

**Physics**

According to the law of universal gravitation, there is force of attraction between any two bodies in the universe, WHY CAN'T YOU FEEL THIS FORCE BETWEEN YOU AND YOUR SEATMATE? ~>Thanks for those who are helping!
*Monday, October 19, 2009 at 9:18am by Shane*

**physics(universal law of gravitation)**

a satellite has a mass of 100 kg and is located at 2 x 10^6 m above the surface if the Earth. wHAT is the potential energy associated with the satellite at this location? What is the magnitude of the gravitational force on the satellite?
*Thursday, January 14, 2010 at 10:11pm by Nina*

**Science**

a question regarding Universal Law Of Gravitation. If the clouds are 50 km. high , what is its proportional distance to a globe which is one foot in diameter ? Thank you :))
*Wednesday, September 28, 2011 at 8:39am by Anna*

**physics**

he universal law of gravitation describes the force of gravity between two bodies. What does it say about the strength of the gravitational field? How does the size of the object affect the use of the gravitational field equation?
*Tuesday, May 15, 2012 at 7:11pm by dreamygirl*

**Physics**

Starting from Newton’s law of universal gravitation, show how to find the speed of the moon in its orbit from the earth-moon distance of 3.9 × 108 m and the earth’s mass. Assume the orbit is a circle.
*Friday, December 16, 2011 at 10:37am by Calitryphosa*

**physics**

We will be happy to critique your work after you have shown some effort. Hints: 1. the length does not matter 2. Torque = force * (lever arm) 3. Compute the forces between each the origin object and each of the other two, and add them vectorially. Use Newton's universal law of...
*Friday, July 11, 2008 at 8:08am by drwls*

**Physics**

"Proof" is hardly the term. You are deriviving Keplers law from the universal law of gravitation. Remember that Kepler's law applies to things in orbit, where the force of gravity supplies enough pull to keep it in orbit,or forcegravity=forcecentripetal. GMm/r^2= mv^2/r= m (...
*Wednesday, August 19, 2009 at 12:27pm by bobpursley*

**Physics**

Using newton's law of universal gravitation and the following data calculate the theoretical value of the acceleration due to gravity on mars. Mars Mass= 6.4185x 10^23 kg Radius (equatorial)= 3.3962x 10^6m
*Tuesday, November 9, 2010 at 5:54pm by Amy*

**physical science **

Newton's law of universal gravitation utters that every giant particle in the universe. Proportioned mass also catch the attention of masses external to its surface, even close up... F12 is the force applied on object 2 due to object 1 ... While Newton was able to make his ...
*Friday, December 31, 2010 at 11:23pm by yolanda*

**science **

For goodness sake! Please use standard English. I just figured out what the 2a was = to a (with necessary space between) Please try some of the sites here: http://www.google.com/search?q=friction+forces+between+2+surfaces+%26+the+law+of+universal+gravitation&ie=utf-8&oe=utf-8&...
*Tuesday, October 20, 2009 at 8:57pm by SraJMcGin*

**Physics / Astronomy**

Here is my question: Consider the bending of light by the gravitation of the Sun as described by Newtonian physics. Light of frequency f passes at a distance d from the center of the Sun, which has a mass M. Show that the bending angle of the light is proportional to M/d. I'm ...
*Wednesday, May 28, 2008 at 8:58pm by Barry*

**Physics**

use T^2 = 4*pi^2*r^2/GM T and r are given, G -Universal constant of gravitation. Compute M - mass of star
*Friday, June 29, 2012 at 2:30pm by ajayb*

**physics....**

The universal law of gravitation describes the force of gravity between two bodies. What does it say about the strength of the gravitational field? How does the size of the object affect the use of the gravitational field equation? i know that the gravitational field strength ...
*Friday, June 1, 2012 at 8:27pm by kennedy*

**Physics**

The Law of Universal Gravitation states that each particle of matter attracts every other particle of matter with a force which is directly proportional to the product of their masses and inversely proportional to the square of the distance between them. Expressed ...
*Thursday, November 3, 2011 at 2:42pm by tchrwill*

**Physics**

G is the universal gravitation constant. That means, it is constant.
*Sunday, November 15, 2009 at 6:57pm by bobpursley*

**physics**

Law of gravitation of course. That is what we are using.
*Saturday, March 14, 2009 at 6:37pm by Damon*

**Physics - weighing a planet**

Explain how you can weigh a planet? ( Is it by the combination of the netwons law of univeral gravitation and keplers third law; t^2/r^3 = 4(pi)^2/G(Msun) )
*Sunday, August 22, 2010 at 2:42pm by Shaila*

**Science check answer quick!**

I really do not understand Number 7 Which of these does Newton's law of universal gravitation imply? (Points : 1) The force of gravity between two objects is inversely proportional to the product of the two masses. <-- Earth's gravity acts on people inside a space station ...
*Tuesday, January 7, 2014 at 12:43pm by Gianna*

**physics**

Use Newton's universal law of gravity. It must be in your course materials somewhere. It is usually written F = G*m1*m2/R^2 G is the universal constant, 6.67*10^-11 N*m^2/kg^2, and the other terms have their usual meanings. The force of attraction that you get will be very ...
*Tuesday, November 8, 2011 at 6:54pm by drwls*

**Columbs Law**

I need help with the following questions from my homework. thanks! How does one coulomb of charge compare with the charge of a single electron? How is coulombs law similar to Newton's law of gravitation? How is it different?
*Monday, November 5, 2007 at 8:13pm by Whit*

**Physics - Newton's Law of universal gravitation**

http://csep10.phys.utk.edu/astr161/lect/history/newtongrav.html
*Sunday, August 22, 2010 at 2:38pm by bobpursley*

**Math**

The universal law of gravitation determines the amount of force exerted by a constant mass (M) on another constant mass (m), separated by a distance (r), is given by the expression F = ( -GmM )/r^2 a) What mathematical expression characterises the instant rate of change of the...
*Saturday, October 15, 2011 at 4:20pm by Raf*

**Physics**

Using Newton's law and the law of universal graviation: F=ma Acceleration is centripital acceleration, so a=(v^2)/r so G(m^2/r^2)=m(v^2/r)
*Tuesday, July 12, 2011 at 2:34pm by Robin*

**physics**

Use Newton's universal law of gravity, F = G M1 M2 /R^2 M1 and M2 are the two masses R must be measured center to center, so in this case R = 19.4 m Solve for F You may have to look up the universal constant G
*Friday, November 26, 2010 at 7:58pm by drwls*

**Physics**

A 21.0-kg satellite has a circular orbit with a period of 2.37 h and a radius of 8.50×106 m around a planet of unknown mass. If the magnitude of the gravitational acceleration on the surface of the planet is 7.10 m/s2, what is the radius of the planet? Use Kepler's third law (...
*Friday, February 16, 2007 at 4:31pm by winterWX*

**Physics**

Let Distance from the earth to the moon, D=384,403km =384,403,000 m Mass of the earth, M1 = 5.98*10^24 kg Mass of the moon, M2 = 7.35*10^22 kg Mass of spacecraft, m Gravitational constant, G r = distance of spacecraft from (the centre of) the earth Using Newton's law of ...
*Wednesday, December 23, 2009 at 5:32pm by MathMate*

**Physics**

Refer to Newton's universal law of gravity
*Monday, May 3, 2010 at 12:28pm by drwls*

**physics**

1. Suppose that the strength of the electric field about an isolated point charge has a certain value at a distance of 1 m. How will the electric field strength compare at a distance of 2 m from the point charge? I know it's At twice the distance the field strength will be 1/4...
*Wednesday, July 14, 2010 at 11:23am by anonymous*

**physics**

You need to know the mass of Jupiter to do this problem. Jupiter has a total mass of 1.9 x 10^27 kg. Now use Newton's universal law of gravity to get the mass of Io. Force = G*M(jupiter)*M(io)/R^2 G is the universal gravty cnstant.
*Sunday, April 24, 2011 at 11:10pm by drwls*

**science **

Which statement best describes Newton’s Law of Universal Gravitation? A.Large objects, like Earth and the Sun, attract other objects everywhere in the universe. B.Gravity is a kind of magnetic force between objects and Earth. C.Gravity is the result of the curvature of space ...
*Monday, February 17, 2014 at 8:35pm by victoria *

**physics**

why is it wrong to think of a scientific law as a universal statement of truth?
*Sunday, October 2, 2011 at 10:35pm by Rebecca*

**Physics**

PE= GMm/r ....see the law of gravitation. 1/2 mv^2=GMm/r remember that density=M/(4/3 PI r^3)
*Tuesday, December 16, 2008 at 7:10pm by bobpursley*

**English**

1. She is Marie Curie. She is a French physicist. However, she was born in Poland. She discovered the pure radium. She was awarded two Nobel Prizes. [She was the only person to be awarded two Nobel Prizes.] (Would you like to check the passages above? Check them please.) 2. He...
*Friday, October 30, 2009 at 8:55pm by rfvv*

**physics (Newton's law of gravitation)**

Duplicate post. See the answer I posted to your other post of this question.
*Sunday, April 21, 2013 at 9:57pm by drwls*

**space/astronomy**

"as radius increases , gravitational pull decreases" This rule applies to measurements made at the surface of objects with the same mass. If we restrict ourselves to Newtonian mechanics, which should apply at 10 AU, and if the masses are all equal at 1M sun, the gravitational ...
*Monday, November 30, 2009 at 9:17pm by MathMate*

**Science check answer quick!**

Which of these does Newton's law of universal gravitation imply? (Points : 1) The force of gravity between two objects is inversely proportional to the product of the two masses. <-- NO!!!!!!!!!! DIRECTLY PROPORTIONAL +++++++++++++++++++++++++++ Earth's gravity acts on ...
*Tuesday, January 7, 2014 at 12:43pm by Damon*

**Physics**

Use Newton's universal law of gravity F = G M1*M2/R^2 to get the mass product M1*M2. G is the universal constant, which you should look up. You also know that M1 + M2 = 4.0 kg Knowing both the product and the sum of the masses, you can get the individual masses using algebra.
*Monday, February 21, 2011 at 10:37pm by drwls*

**earth**

The earth doesn't "float", it orbits the sun following Newton's Law of Universal Gravitation. The presence of the sun, which is much more massive than earth and the other planets, drives the movement of the planets. The sun is so dense that a spoonful of it is approximately as...
*Wednesday, September 29, 2010 at 9:06am by Lee*

**Physics**

Newton's law of universal gravitation: where force equals the universal constant of gravity multiplied by mass of the earth and mass of an object divided by the raduis squared F = G((m1*m2)/(r^2)) Force equals the mass of an object multiplied by the acceleration or 'g' mg = G...
*Thursday, February 24, 2011 at 8:04pm by Ash*

**Physics**

Start with F = ma and the universal law of gravity. What do you mean by "motion under waves" ?
*Wednesday, July 20, 2011 at 6:27pm by drwls*

**physics**

calculate the force of Earth's gravity on a spacecraft 12,800 km (2 Earth radii) above Earth's surface if its mass is 1350 kg. i know the universal gravitation formula is Fg = G [(m1 m2)/ r^2] but im not getting anywhere near the multiply choice answers of: 14,470, 4410 N, ...
*Monday, October 26, 2009 at 10:03pm by Sasha*

**Math2**

The universal law of gravitation determines the amount of force exerted by a constant mass (M) on another constant mass (m), separated by a distance (r), is given by the expression F = ( -GmM )/r^2 a) What mathematical expression characterises the instant rate of change of the...
*Tuesday, October 18, 2011 at 2:52pm by Raf*

**physics**

On a distant planet, the acceleration due to gravity is 5.30 m/s2, and the radius is 4600 km. Use the law of gravitation to calculate the mass of this planet.
*Friday, February 25, 2011 at 9:11am by Student*

**physics**

Use Newton's universal law of gravity. F = G M1 M2/R^2 In this case, M2 = 2 M1. Therefore F = 2 M1^2/R^2. M1 is the mass of the smaller sphere. R is the separation. Look up the universal constand G; it must be in your notes, or textbook. Solve for the smaller mass, M1. Double ...
*Monday, January 18, 2010 at 11:02am by drwls*

**C++ Programming**

I NEED HELP WITH MY CODE!!! it won't compile right The formula for finding the force of gravity between two objects is Force = grav * (mass1 * mass2) / (radius * radius), where Force = the force of gravity between the two objects, grav = the universal gravitation constant (6....
*Wednesday, February 13, 2008 at 11:12pm by sonnysn*

**physics**

What are the units that follow 3.45? meters? inches? light years? Whatever they are, use Newton's universal law of gravity
*Thursday, June 23, 2011 at 6:16pm by drwls*

**science**

What do you think, and why? TAke a look at Newton's law of Gravitation.
*Monday, October 13, 2008 at 4:15pm by bobpursley*

**English**

Albert Einstein (1879-1955) He is an American physicist. He reported "General Theory of Relativity" in 1916. He won a Novel Prize in 1921. Issac Newton(1642-1727) He discovered "the Law of Universal Gravitation" and "the Three Laws of Motion" - laws of inertia, action and ...
*Tuesday, August 11, 2009 at 9:26am by John*

**physics**

Use Newton's universal law of gravity and add the two forces as vectors. They will be 60 degrees apart, and one will be 1.5 times the other.
*Wednesday, December 1, 2010 at 5:00am by drwls*

**chemistry:Gas Laws (2)**

I looked it up in the back of the book. R is a constant. PV = nRT is called the universal gas law and R is called the universal gas constant. R is 0.08205 L*atm/mol*K when P is in atmospheres. R is 8.314 when P is in kPa.
*Thursday, May 28, 2009 at 10:31pm by DrBob222*

**physics**

directly proportional Inellastic collision Inversely proportional Joule Lever arm Non inertial reference frame inertial reference frame Pascal Pascal's principal rate revolution rotation spring constant spring force universal gravitation Henry cavendish
*Wednesday, May 27, 2009 at 8:38pm by chelsea*

**physics**

gravational force deimos, a satellite of amrs, has an average radius of 6.3 km. If the gravational force between deimos and a 3.0 kg rock at its surface is 2.5x10(-2)N..what is the mass of deimos ? Use the Universal Law of gravitation: Force= G Mm/distance^2 Solve for M. i did...
*Tuesday, November 28, 2006 at 8:04pm by arielle*

**physics**

Newton’s universal law is F =G•m1•m2/R1², if R2= R1/2, F1 =4F
*Wednesday, May 2, 2012 at 12:51am by Elena*

**science**

Newton’s law of universal gravitation is rep- resented by F=GMm r2 Here F is the gravitational force, M and m are masses, and r is a length. Force has the SI units kg · m/s2. What are the SI units of the proportionality constant G? 1. m2/(kg2 · s2) 2. m/(kg · s2) 3. m2/kg 4. N...
*Saturday, August 31, 2013 at 8:21pm by dani*

**physics**

You must have been learning about Newton's universal law of gravity: F = G*M1*M2/R^2 Use it. Looking up the value of G will be a worthwhile exercise.
*Tuesday, January 11, 2011 at 1:10am by drwls*

**physics**

Use Newton's universal law of gravity. It has a constant G in it that you will need to look up. You should find the exercise useful. It looks like this: F = G M1*M2/R^2
*Sunday, June 5, 2011 at 1:02am by drwls*

**physics**

It looks like the want you to compute the resultant gravitational force on the centroid mass, due to the three masses at the corners. Use the newton universal law of gravity.
*Friday, July 27, 2012 at 11:59am by drwls*

**gr 11 physics**

The earth's gravity reaches out forever but the force of attraction on bodies at great distances would be extremely small depending on the mass of the body. The Law of Universal Gravitation states that each particle of matter attracts every other particle of matter with a ...
*Thursday, November 26, 2009 at 10:48pm by tchrwill*

**Physics**

Calculate the percentage of Earth’s gravitational force on the ISS astronauts while orbiting at an altitude of 248 miles above Earth’s surface. To do this, compare the gravitational force on an orbiting astronaut to the force on the astronaut here at Earth’s surface using the ...
*Tuesday, January 28, 2014 at 11:18pm by Haley*

**physics**

Assume 5m is the center-to-center distance R, and use Newton's universal law of gravity. (The one with the capital G). F = G*M^2/R^2 = 64*G/25
*Thursday, April 28, 2011 at 11:03pm by drwls*

**Physics - Gravitational force**

Neither. The "r" in the universal law of ravity is the distance between the two bodies (about 150 million km in this case). Make sure it is in meters.
*Saturday, August 21, 2010 at 3:30pm by drwls*

**physics**

Use Newton's universal law of gravity, with the constant G F = G*m1*m2/R^2 R should be in meters, and masses in kg, if you want the force in Newtons. Look up the value of G if your don't know it. It is NOT the same as g.
*Monday, November 22, 2010 at 11:37am by drwls*

**physics**

Ms is the mass of Saturn, Md is mass of the dog. Are you not familiar with the Law of Gravitation? d is the distance the dog is from the center of Saturn (ie, radius). You need to look this up in the text.
*Monday, November 1, 2010 at 6:39pm by bobpursley*

**physics**

7) Look at Newton's universal law of gravity. F = G M m /R^2 I suggest you memorize it. The gravitational attraction force is proportional to the product, not the sum, of the masses. Try again. 8) Note the inverse square dependence upon distance in the law of gravity, which I ...
*Tuesday, April 1, 2008 at 9:59pm by drwls*

**Physics**

The data you need is the Mass of the Earth, Mass of the Moon, the radius of Moons orbit, and the universal gravitation constant. From the centers of Earth adn Moon, you know that distance, then let some x be from center of earth. Find Force gravity of Earth at x, then find ...
*Sunday, September 13, 2009 at 9:42am by bobpursley*

**Maths and Physics**

Law of Gravitation- Find an expression for the magnitude of the initial velocity that a projectile must possess in order to leave the earth when air friction is neglected. The gravitational constant for g is, G = 6.67428*10^-11 m^3 Kg^-1 s^-2 (10 marks). Kind Regards
*Tuesday, April 19, 2011 at 10:19am by David*

**Physics**

Vectorially add the forces due to m2 and m3, acting upon m1. Use Newton's universal law of gravity for the individual forces.
*Thursday, March 17, 2011 at 8:54pm by drwls*

**Physical sciences**

What is the universal law?
*Thursday, March 21, 2013 at 2:34am by Miranda*

**physics, plehase help**

The force of gravitation between two objects. Is 500 Newton's. What would the force of gravitation be if the distance between these two objects increased by 10 times?
*Saturday, January 30, 2010 at 10:00am by coco*

**Physics**

(a) Get the force acting on each ball from Newton's universal law of gravity. That's whereto begin. Force = G*M1*M2/r^2 (same for both balls) G = universal constant M1 = black ball mass M2 = red ball mass The acceleration of the red ball will be that force divided by the mass ...
*Thursday, March 8, 2012 at 9:13pm by drwls*

**physics**

1. Two point charges are separated by 6 cm. The attractive force between them is 14 N. Find the force between them when they are separated by 12 cm. 2. The SI unit of mass is the kilogram. What is the SI unit of charge? 3. The proportionality constant k in Coulomb’s law is ...
*Wednesday, July 14, 2010 at 11:32am by Nicole*

**physics**

Use the universal law of gravity. F = G*M1*M2/R^2 If M1 is the heavier mass, F = 2G*M1^2/R^2 = 2*10^-12 N R = 2.9 m Look up G and solve for M1
*Saturday, December 11, 2010 at 10:53pm by drwls*

**Math And Physics**

Law of Gravitation- Find an expression for the magnitude of the initial velocity that a projectile must possess in order to leave the earth when air friction is neglected. The gravitational constant for g is, G = 6.67428*10^-11 m^3 Kg^-1 s^-2 Please answer the question fully ...
*Sunday, May 1, 2011 at 12:18pm by Dwayne*

**PHYSICS**

assume you have a mass of 100 kg on earth. on the moon, where the gravitation of the moon is 1/6 gravitation of the earth, what is your mass on the moon and what is your weight on the moon
*Wednesday, December 22, 2010 at 7:30pm by Katie*

**physics**

Use Newton's law of gravitation. g=(m_1)(m_2)(G)/(d^2) m_1 = mass of first body m_2 = mass of second body G = gravitational constant (value is unimportant for this particular problem) d = distance between bodies.
*Friday, November 14, 2008 at 7:33pm by Noether*

**physics**

If I halve the distance between 2 gravitating bodies,Newtons universal law of gravity states that the force between them will____ to _____ of the force begore the change. Thank you for the help
*Wednesday, May 2, 2012 at 12:51am by brent k*

**Phyics**

Well, Newtons gravitation law is force=GMm/d^2 but for you, mass m, your acceleration by falling in gravity must be Force=ma or a=F/m= GM/d^2
*Friday, October 5, 2007 at 8:59pm by bobpursley*

**physics college**

Use Newton's Law of Gravitation to compute the work W required to propel a 1100 kg satellite out of the earth's gravitational field. You may assume that the earth's mass is 5.981024 kg and is concentrated at its center. Take the radius of the earth to be 6.37106 m and G = 6....
*Wednesday, May 16, 2012 at 4:38pm by lost*

**Math And Physics**

Law of Gravitation- Find an expression for the magnitude of the initial velocity that a projectile must possess in order to leave the earth when air friction is neglected. The gravitational constant for g is, G = 6.67428*10^-11 m^3 Kg^-1 s^-2 Please answer the question fully ...
*Sunday, May 1, 2011 at 2:27pm by Dwayne*

**Physics**

Your guess is way off the mark. Try reading your text instead of guessing. You need to review Newton's universal law of gravity.. the one with the factor G in it. . I provided the equation in the answer to one of your other posts.
*Saturday, October 31, 2009 at 3:31pm by drwls*

**Physics**

For each of the three masses, they want to to add the gravitational attraction forces due to the other two. For mass b, the attraction forces will be in opposite directions. Use Newton's Universal Law of Gravity, with the factor G
*Sunday, February 21, 2010 at 5:50pm by drwls*

**Physics**

Assume the Earth is a perfect sphere of radius 6,400 kilometers. Find the weight of a 75.0 kg person at the North pole. Find the weight of this same person at the equator. (You don't need to use Newton's Law of Gravitation but you do need to analyze the radial/centripetal force.)
*Thursday, July 26, 2012 at 11:59am by Zac*

**Physics**

Newton's law of gravitation: F = G m1 m2 /r^2 let m2 = mass of ice cube and s = G m1/r^2 so, F = s m2 rearranging, s = m2/F let V = orbital speed centripetal acceleration = V^2/r For an object to remain in orbit s must equal the centripetal acceleration so, s = V^2/r
*Wednesday, March 10, 2010 at 11:08pm by FredR*

**physics**

The centripetal acceleration of a satellite in a circular orbit is V^2/R , but V is a function of R also. For an earth satellite GM/R^2 = V^2/R where g is the universal constant of gravity and M is the mass of the earth. Therefore V^2 = GM/R, and V^2 is inversely proportional ...
*Saturday, January 19, 2008 at 10:49pm by drwls*

**Physics**

Let X be the distance from Earth. You will need the mass of the Earth also. Call it M and the moon's mass m. Let D = 3.84*10^5 km For the forces to be equal, G M/x^2 = G m/(D-x)^2 G (the universal law of gravity constant) cancels out. Solve for x/D in terms of M/m [(D-x)/x]^2...
*Saturday, April 11, 2009 at 7:29am by drwls*

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