Friday

September 30, 2016
Number of results: 68,277

**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

*August 22, 2010 by Shaila*

**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 ...

*May 28, 2008 by Barry*

**physics**

a particle having a charge of -2.0 x 10^-9 is acted on by a downward electric force of 3.0 x 10^-6 in a uniform electric field. what is the magnitude and direction of the electric force exerted on a proton placed in this field. what is the gravitation force on the proton. what...

*September 6, 2016 by Supansa*

**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

*December 22, 2010 by Katie*

**Physics**

the hubble telescope has a mass of 1.5 x 10^4 kg and its orbiting the earth 596 km above the ground surface.the earths radius is 6.38 x 10^3km. CAlculate a)the force of gravitation on the telescope due to the earth's pull. given: G=6.67 x 10^-11Nm/kg and the mass of earth is 5...

*October 29, 2007 by johnny*

**Physics**

What would the gravitation PE and Elastic PE be like on the moon?

*June 24, 2011 by Janice*

**Physics -HS Honors**

When computing the gravitation force, how do you know what the direction of the solution?

*March 11, 2008 by Joan*

**physics**

an electron (m= 9.11 x 10^-31 kg) and a proton (m+ 1.6 x 10^-27 kg) are separated by 1.0 x 10^-10 m. what is the gravitation force between them? help please!

*January 28, 2013 by Isis*

**Physics Help!!**

Comparing Einstein's and Newton's theories of gravitation, can the correspondence principle be applied? and Why or Why not? a)Yes b)No

*May 7, 2012 by Jake*

**6th grade science (physics)**

explain and describe Law of Universal Gravitation in relation to force, mass and distance

*April 18, 2010 by Tyler*

**physics**

if the masses remain the same ,but the separation is decreased to one-half of the original distance . what happens to the gravitation force?

*November 26, 2012 by mary grace *

**physics**

2 masses m and 4m are placed at 12meter distance. where a mass of 10 kg can be placed between them so that the net gravitation force on it become zero.

*October 9, 2014 by latika*

**physics**

2 masses m and 4m are placed at 12meter distance. where a mass of 10 kg can be placed between them so that the net gravitation force on it become zero.

*October 9, 2014 by latika*

**physics (gravitation)**

At what height above the surface of the earth does the acceleration due to gravity reduces by 64% .radius of earth 6400 km

*February 6, 2015 by riya*

**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:-)

*February 20, 2009 by Bella*

**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.

*February 25, 2011 by Student*

**physics**

An electron is released from rest in a uniform electric field of magnitude 2.00 x 10e4 N/C. Calculate the acceleration of the electron (neglect gravitation).

*February 2, 2012 by Shakirah*

**physics**

two lead spheres whose diameters are 20 cm and 2 cm are placed with centres 100 cm apart. Calculate the force of gravitation between them.(density of lead =11500 kg/m^3

*May 15, 2013 by Dhananjay*

**physics**

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.

*May 28, 2008 by Greg*

**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) )

*August 22, 2010 by Shaila*

**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

*November 9, 2010 by Amy*

**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

*April 19, 2011 by David*

**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?

*January 14, 2010 by Nina*

**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!

*October 19, 2009 by Shane*

**physics**

The radius of a planet R1 and satellite revolves round it in a circle of radius R2. The time period of revolution is T.find the acceleration due to the gravitation of the planet at its surface.

*May 26, 2013 by subharaj*

**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 ...

*January 28, 2014 by Haley*

**Physics Gravitation Weight**

What will a spring scale read for the weight of a 75-kg woman in an elevator that moves upward with acceleration of 0.30-g? Unsure of how to solve this problem. Can someone please walk me through it step by step. Thank you

*June 16, 2012 by Mike Joseph*

**Physics**

A rocket which is 700000kg(given that the rocket never loses mass) working with 10.000.000 Newton, how much is the acceleration? basic question, but i was wondering about the gravitation how would you calculate this.

*March 18, 2016 by Steinar*

**Physics (deriving Keplers 3rd law)**

How do I derive a straightforward form of Kepler's 3rd Law if I start with Newtons's Law of Gravitation. (the opposite of what Newton did)

*September 10, 2015 by Jason*

**science**

Explain the law of universal gravitation

*January 10, 2012 by glenn*

**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?

*May 15, 2012 by dreamygirl*

**Physics**

A space probe is carried by a rocket into outer space where it continues to move on its own in a straight line. What keeps the probe moving? Is the answer: the gravitation forces from diﬀerent stars and planets

*March 1, 2013 by Sally*

**6th grade science**

What is the universal law of gravitation?

*March 18, 2010 by mary*

**science**

The gravitation pull of a object depends 2 factors what are they

*January 10, 2012 by glenn*

**Science**

What is the best definition for The law of universal gravitation ?

*January 16, 2012 by Jim*

**physic**

Which of these is not a statement of newton's law of universal gravitation?

*February 7, 2014 by femi*

**Physics**

determine the point of zero gravitation force, as measured from the centre of earth (mass 5.97 x 10^24 kg) to the sun ( mass 1.99 x 10^30 kg) if the earth-sun distance is 150 x 10^6 km.

*February 13, 2016 by S*

**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.

*December 16, 2011 by Calitryphosa*

**Physics**

I have to create a teaching aid for physics based on the principles i have learnt like gravitation , mechanical properties and many more. I am not able to find the right experiment to demonstrate infront of my teacher.Please help me deal with this by providing information ...

*January 25, 2012 by confused*

**Physics**

I have to create a teaching aid for physics based on the principles i have learnt like gravitation , mechanical properties and many more. I am not able to find the right experiment to demonstrate infront of my teacher.Please help me deal with this by providing information ...

*January 26, 2012 by confused*

**science**

how does mass differ from weight what is law of universal gravitation

*October 26, 2009 by dai*

**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, ...

*October 26, 2009 by Sasha*

**Physics (A man in the lift)**

A man of mass m is standing in an elevator. The elevator is accelerating downward at g/k, where k>1 and g is the gravitation acceleration. If the force on the man by the elevator's floof jmg, where j is a constant and k= a/(b+cj), where gcd(|a|,|b|,|c|)=1, what is a+b+c? If...

*July 3, 2014 by Ahsanur*

**drwl please check**

A shot-putter puts a shot (weight = 70.1 N) that leaves his hand at distance of 1.53 m above the ground. (a) Find the work done by the gravitation force when the shot has risen to a height of 2.18 m above the ground. Include the correct sign for work. (b) Determine the change...

*February 27, 2007 by Mary*

**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....

*May 16, 2012 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 ...

*May 1, 2011 by Dwayne*

**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. So I calculated this and got 1.0 km/s, I was just wondering if anyone knows ...

*December 31, 2014 by Marie*

**Solar system**

According to the theory of gravitation, the earth must be continually “falling” toward

*December 31, 2006 by Don*

**science**

what is the 3 laws of motion? & what is the law of universal gravitation plz answer thx in advance

*January 22, 2008 by sammy*

**Physic**

I need someone that can help with a formula any smart people. Law of universal gravitation f=g m 1 x m2 /r^2 needs to k ow what g is? Help?

*October 17, 2014 by Christian *

**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 ...

*May 1, 2011 by Dwayne*

**science **

what factors affect the friction forces between two surfeces 2a what is the law of universal gravitation

*October 20, 2009 by sophie*

**Physics-Gravitation**

What is the gravitational potential energy of a two-particle system with masses 5.4 kg and 5.0 kg, if they are separated by 1.3 m? If you triple the separation between the particles, how much work is done (b) by the gravitational force between the particles and (c) by you? ...

*January 2, 2011 by Jessica*

**science**

Can you tell me more about velocity, accelration, motion, position, friction, gravity, weight and gravitation.

*November 16, 2009 by Anonymous*

**physics**

safiya places a 5.o-kilogram brick on chair in the classroom.the chair is 1.o meter off the ground.what is the gravitation potential of the brick if it falls off the chair?remember that gravity equals 9.8 meter per second squared.

*March 9, 2011 by ROSE*

**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 ...

*June 1, 2012 by kennedy*

**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.)

*July 26, 2012 by Zac*

**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 :))

*September 28, 2011 by Anna*

**Physics Help**

If we witness events taking place on the moon, where gravitation is weaker than on Earth, would we expect to see a gravitational red shift or a gravitational blue shift? and Explain please a)blue shift b)red shift c)no shift

*May 9, 2012 by Jake*

**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....

*February 13, 2008 by sonnysn*

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

I need help with this question until the end if you can, please. Thank you. A neutron star and a black hole are 2.400e+12 m from each other at a certain point in their orbit. The neutron star has a mass of 2.78×10^30 kg and the black hole has a mass of 9.94×10^30 kg. What is ...

*April 22, 2013 by Kathy PLEASE HELP*

**Physics**

The charge of a proton is 1.6 x 10-19 C. The mass of a proton is 1.673 x 10-27 kg. The constant in the universal law of gravitation is 6.673 x 10-11 Nm2/kg2. The constant in the Coulomb¡¯s law is 9x109 Nm2/C2. Calculate the numerical value of both the gravitational and ...

*January 11, 2016 by Amy*

**Physics**

A shot-putter puts a shot (weight = 71.9 N) that leaves his hand at distance of 1.47 m above the ground. (a) Find the work done by the gravitation force when the shot has risen to a height of 2.20 m above the ground. Include the correct sign for work. J (b) Determine the ...

*November 2, 2008 by Brandon*

**Physics 1**

A shot-putter puts a shot (weight = 71.3 N) that leaves his hand at distance of 1.62 m above the ground. (a) Find the work done by the gravitation force when the shot has risen to a height of 2.08 m above the ground. Include the correct sign for work. J (b) Determine the ...

*November 17, 2012 by Anonymous*

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

Could anyone please help me with this problem? I would really appreciate it. The top of Mt. Everest is 8850 m above sea level. Assume that sea level is at the average Earth radius of 6.38×106 m. What is the magnitude of the gravitational acceleration at the top of Mt. Everest...

*April 21, 2013 by Kathy*

**science**

the cake is sititing on table with a gravitation force of 57.6 and a normal force of 57.6 what is the sum of all forces

*May 20, 2015 by Anonymous*

**physics**

Tom has a mass of 72.2 kg and Sally has a mass of 49.4 kg. Tom and Sally are standing 17.4 m apart on a massless dance ﬂoor. Sally looks up and she sees Tom. She feels an attraction. If the attraction is gravitation, ﬁnd its magnitude. Assume both can be replaced...

*December 13, 2012 by Anonymous*

**physics**

Tom has a mass of 67.2 kg and Sally has a mass of 58.5 kg. Tom and Sally are standing 23 m apart on a massless dance floor. Sally looks up and she sees Tom. She feels an attraction. If the attraction is gravitation, find its magnitude. Assume both can be replaced by spherical ...

*January 24, 2015 by Andy*

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

Please, can someone help me with this? A neutron star and a black hole are 2.400e+12 m from each other at a certain point in their orbit. The neutron star has a mass of 2.78×1030 kg and the black hole has a mass of 9.94×1030 kg. What is the magnitude of the gravitational ...

*April 21, 2013 by Kathy*

**Physics**

no idea all HELP appreciated!! A shot-putter puts a shot (weight = 70.3 N) that leaves his hand at distance of 1.45 m above the ground. (a) Find the work done by the gravitation force when the shot has risen to a height of 2.15 m above the ground. Include the correct sign for ...

*October 19, 2009 by Joe*

**Physics Help please**

If we witness events taking place on the moon, where gravitation is weaker than on Earth, would we expect to see a gravitational red shift or a gravitational blue shift? and Explain please a)blue shift b)red shift c)no shift

*May 7, 2012 by Jake*

**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

*May 27, 2009 by chelsea*

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

Can anyone please help me with this question? I am really confused. A neutron star and a black hole are 2.400e+12 m from each other at a certain point in their orbit. The neutron star has a mass of 2.78×1030 kg and the black hole has a mass of 9.94×1030 kg. What is the ...

*April 21, 2013 by Kathy*

**science**

imagine you are in a spaceship flying from the earth - describe what you see from the space and how you feel as it moves out of the gravitation pull of earth?

*August 25, 2010 by sarthak*

**science**

imagine you are in a spaceship flying from the earth - describe what you see from the space and how you feel as it moves out of the gravitation pull of earth?

*August 25, 2010 by sarthak*

**Physics**

James joule measures temperature of the water at the top and bottom of the waterfalls. If one of these waterfalls is 55m high, and all gravitation energy of the water is at the top of the falls. What temperature difference would be between the water at the top and bottom? (...

*November 25, 2013 by Sam*

**Physics**

James joule measures temperature of the water at the top and bottom of the waterfalls. If one of these waterfalls is 55m high, and all gravitation energy of the water is at the top of the falls. What temperature difference would be between the water at the top and bottom? (...

*November 25, 2013 by Sam*

**science**

Can you tell about velocity, accelration, motion, position, friction, gravity, weight and gravitation. i mean 4th grade velocity.

*November 16, 2009 by Anonymous*

**physics**

. The space shuttle typically orbits 400 km above the earth's surface. The earth has a mass of 5.98 × 1024 kg and a radius of 6,380 km. A) How much would a 2000 kg part for the space station weigh when it has been lifted to that orbit in the shuttle's cargo bay? B) What is the...

*December 3, 2012 by Chelsey Achord*

**Physics**

When we say that the weight of an object is Mg, and that g = 9.8 N/kg, what assumptions are we making? Which of the below? The distribution of mass in the earth is spherically symmetric. The density of the earth is the same everywhere. The earth's interior is solid everywhere...

*January 25, 2013 by arcos15*

**Physics**

When we say that the weight of an object is Mg, and that g = 9.8 N/kg, what assumptions are we making? Which of the below? -The distribution of mass in the earth is spherically symmetric. -The density of the earth is the same everywhere. -The earth's interior is solid ...

*January 25, 2013 by arcos15*

**Physics**

The space shuttle typically orbits 400 km above the earth's surface. The earth has a mass of 5.98 × 1024 kg and a radius of 6,380 km. A) How much would a 2000 kg part for the space station weigh when it has been lifted to that orbit in the shuttle's cargo bay? B) What is the ...

*May 13, 2014 by Space Shuttle-Q1*

**Physics HELLLPPPP**

When we say that the weight of an object is Mg, and that g = 9.8 N/kg, what assumptions are we making? Which of the below? -The distribution of mass in the earth is spherically symmetric. -The density of the earth is the same everywhere. -The earth's interior is solid ...

*January 25, 2013 by NATTT*

**Algebra2- Inverses**

The Law of Gravitation is represented by the formula Fg=G(m1m2/r2) What would be the inverse of this function Fg-1? What would this force represent? Can someone plz hurry and answer this for me

*January 9, 2007 by Natalie*

**Physics 3**

A 2.3-keV proton is moving horizontally and passes perpendicular to the Earth’s magnetic field at a location where the field magnitude is 52.0 T. i) Determine the magnetic force on the proton? ii) Find the ratio of this force to the gravitation force on the proton? iii...

*April 13, 2011 by Ziera*

**Physics 3**

A 2.3-keV proton is moving horizontally and passes perpendicular to the Earth’s magnetic field at a location where the field magnitude is 52.0 T. i) Determine the magnetic force on the proton? ii) Find the ratio of this force to the gravitation force on the proton? iii...

*April 13, 2011 by Ziera*

**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 ...

*July 14, 2010 by Nicole*

**Physics**

A ski slope drops at an angle of 24 degrees with respect to the horizontal and is 500 m long. A 60 kg skier skis down from the top to the bottom of the slope. A.) Determine the change in gravitational potential energy of the skier+earth system. b.) If 20% of the gravitation ...

*November 12, 2012 by Iza*

**physics**

A ski slope drops at an angle of 24 degrees with respect to the horizontal and is 500 m long. A 60 kg skier skis down from the top to the bottom of the slope. A.) Determine the change in gravitational potential energy of the skier+earth system. b.) If 20% of the gravitation ...

*July 14, 2014 by bibs*

**calculus**

Use Newton's Law of Gravitation to compute the work W required to launch a 1500 kg satellite vertically to an orbit 800 km high. You may assume that the earth's mass is 5.98*10^24 kg and is concentrated at its center. Take the radius of the earth to be 6.37*10^6 m and G = 6.67...

*February 2, 2009 by matt*

**calculus**

Use Newton's Law of Gravitation to compute the work W required to launch a 1500 kg satellite vertically to an orbit 800 km high. You may assume that the earth's mass is 5.98*10^24 kg and is concentrated at its center. Take the radius of the earth to be 6.37*10^6 m and G = 6.67...

*February 3, 2009 by matt*

**Hillbrow s.s.s**

question1 multiple choice.. 1.1.1 The only type of soil water that available to plants is... A gravitation water B hygroscopic water C capillary water D swell water

*October 23, 2015 by mfayise sinovuyo*

**MATH HELP**

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 negelcted. The gravitational constant is given as G= 6.67428*10^-11 m^3 kg^-1 s^-2 Please give lots of details in ...

*April 28, 2011 by AKUMA*

**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?

*November 5, 2007 by Whit*

**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 (...

*February 16, 2007 by winterWX*

**earth**

At what height above the earth surface will an austranouts experience only half the gravitation that he experience on earth

*February 7, 2012 by nonkululeko solomons*

**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...

*November 28, 2006 by arielle*

**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...

*August 31, 2013 by dani*

**Physics (Gravitation)**

2. To leave the gravitational ﬁeld of a planet, a space rocket must be launched at an escape velocity of: ve =r2GM r , where G is the gravitational constant G ¡Ö 6.8¡Á10−11Nm2/kg2, M is the mass of the planet and r is its radius. Suppose that we want to land a ...

*January 28, 2016 by Sarah*

**Newtonian physics**

Over time, non-specialists are usually able to assimilate radically new scientific ideas, even though these ideas may seem strange when they are initially introduced. Such was the case with Newtonian physics; when Newton proposed his ideas regarding motion and gravitation in ...

*November 12, 2008 by Anonymous*