Gravitational force Definition and 491 Threads

Will gravitational force increase or decrease in power in a high amount of energy?

Does a particle placed midway between 2 massive bodies experience weightlessness? Is gravity zero at this point or we just have 2 equal and opposite forces resulting in net acceleration of zero? In other words, if we pulled or pushed a particle in opposite directions but with equal force, the...

Homework Statement Spiderman, whose mass is 80.0 kg, is dangling on the free end of a 12.0 m long rope, the other end of which is fixed to a tree limb above. By repeatedly bending at the waist, he is able to get the rope in motion, eventually getting it to swing enough that he can reach a...

Hi, I have been confused about whether there is any gravitational force between antimatter as what have between matter...and also whether there is gravitational force between antimatter and matter? Thanks Ron

Hey, I was wondering how to go about a pendulum problem, basically if we have a clock pendulum that oscillates with period 2s unaffected; if we add a large mass on the floor, so that the pendulum experiences some small extra gravitational force towards the floor. Now I have determined this...

Homework Statement Three masses are arranged in the (x, y) plane as shown. What is the magnitude of the resulting force on the 2 kg mass at the origin? The value of the universal gravitational constant is 6.6726 × 10^−11 N · m^2/kg^2 . Answer in units of N 2kg @ (0,0) 5kg @ (4,2)...

Homework Statement Infinitely long rod with the z axis at its center. The rod has a uniform mass per unit length \mu. Find the gravitational force vector F on a mass m, at a distance \rho from the z axis. Homework Equations F=-G*(M*m)/R^2 (times radial unit vector rhat for the vector form)The...

Homework Statement The question is what is gravitational force between the Earth and the Sun. We are given the formula F = Gm1m2/d2. I found the mass of the sun and the Earth the gravitational constant and the distance. my issue is the G of the equation. G=6.674 x 10^-11 m^3 / kg s^2 my issue...

Homework Statement The magnitude of the gravitational force exerted by the Earth on an object of mass m at the Earth's surface is Fg = G*M*m/ R^2 where M and R are the mass and radius of the Earth. Let's say the object is instead a height y << R above the surface of the Earth. Using a...

[b]1.Nasa fires a 1 tonne space probe, from a stable orbit of altitude 13,620km using a giant rail gun. The rail gun provides the probe with 9.97165*10^10 J of additional kinetic energy. Determine if the probe has enough velocity to escape the Earth's gravity well. The Earth's mass and radius...

Homework Statement Earth orbits around the sun at roughly 1.5x1011 m. Mass of Earth is 6x1024 kg. Mass of sun is 1.98892x1030 kg. There is a point between the sun and the Earth at which the gravitational force by the sun equals that of Earth and the forces cancel each other out. How far is...

Hi. I'm not really all that knowledgeable about physics, so I'm sorry if the answer to this is obvious. Homework Statement I am writing a program for a computer science class in which I am doing an n-body simulation in 3-dimensional space. Currently, I have figured out the gravitational...

Homework Statement what is the gravitational force acting on a person due to another person standing 2 meters away? assume each individual has 59kg mass. Homework Equations looks like i tried to use w=mgy but that was wrong. with that you get like 1156.4 The Attempt at a Solution...

Hey, I need help understanding this concept. so the gravitational force is the "force of attraction between all masses in the universe". right? I was hoping if you could provide a more detailed definition. thanks.

Homework Statement Two equal masses are precisely 1 m apart from each other. The gravitational force each exerts on the other is exactly 2. What is the value of each mass? *a. 1.73*10^5kg b. 1.50*10^10kg c. 2.50*10^5kg d. 1.58*10^10kg Homework Equations F=Gmm/r^2 The...

say two bodies on Earth are aligned a distance r from one another with masses m1 and m2. Do they have a gravitational force that points to each other that are equal and opp direction... please look at my picture ..

Homework Statement Consider a thin hollow fixed spherical shell of radius R and surface mass density rho. A particle initially at rest falls in from infinity. What is its speed when it reaches the center of the shell? (Assume that a tiny hole has been cut in the shell to let the particle thru.)...

Homework Statement M1 is a spherical mass (47.4 kg) at the origin. M2 is also a spherical mass (19.9 kg) and is located on the x-axis at x = 69.6 m. At what value of x would a third mass with a 10.5 kg mass experience no net gravitational force due to M1 and M2? The attempt at a solution...

Gravitation Force (Solved, thanks) Homework Statement A sphere with mass of 65kg and center at origin. Another sphere with mass 79kg at point (0,3), also centered at origin. A.) What is the magnitude of the net gravitational force due to these objects on a third uniform sphere with mass...

Homework Statement Find the gravitational force of the sun on Mercury M_sun = 1.98892 x10^30 kg M_mercury = 3.3022 x10^23 kg Distance of sun and mercury = R = 6.863 x10^10 G = 6.67 x10^-11 Homework Equations FG = GMsunMmercury/R^2 The Attempt at a Solution I simply plugged...

Why do the centripetal and gravitational force equal each other in orbit??Also... Homework Statement Say for example, a problem wants us to find the mass of a planet. It gives us a satellite that orbits that planet with a radius of R and a period T. Now, I know how to solve this problem. You...

Homework Statement An object has a weight W when it is on the surface of a planet of radius R. What will be the gravitational force on the object after it has been moved to a distance of 4 R from the center of the planet Homework Equations No clue The Attempt at a Solution no...

In stenger's book he claims that the ratio between gravity and the electro magnetic is not 1039 Let me know if you think he's right Note that N1 (ratio of EM force to gravity) is not a universal number; it depends on the charges and masses of the bodies you use in the calculation. For an...

Homework Statement AS seen in the figure, two spheres of mass m and a third sphere of mass M form a equilateral triangle. The net gravitational force on the central sphere from the three other spheres is zero. (a) What is M in terms of m? (b) If we double the value of m4, what then is...

Hello everyone, I was doing my Physics homework and a question arose from it: if a mass affects time there is a difference in the time measured near different masses. However if there was no mass at all? Let's pretend this is possible just for theoretical purposes, a perfectly flat...

Homework Statement The drawing (not to scale) shows one alignment of the sun, earth, and moon. The gravitational force that the sun exerts on the moon is perpendicular to the force that the Earth exerts on the moon. The masses are: mass of sun=1.99 × 1030 kg, mass of earth=5.98 × 1024 kg...

Homework Statement Three uniform spheres are located at the corners of an equilateral triangle. Each side of the triangle has a length of 0.550 m. Two of the spheres have a mass of 2.85 kg each. The third sphere (mass unknown) is released from rest. Considering only the gravitational forces...

Homework Statement there are four particles A(0,0) B(10,10) C(0,15) D(0,5) with masses of MassA=5kg MassB=10kg MassC=20kg MassD=25kg Questions: a)total force acting on A. b)total force acting on C. Homework Equations F=Gm1m2/r^2 The Attempt at a Solution

Can we consider gravitational force acting on a body considered as absolute force:-) if so pleas explain

My classmates and I are having a debate on how to solve the following problem. We are told that (and this has been posted on this message board before) that a planet of mass M and radius R is moving SLOWLY through a dust cloud of density (rho). Some of the particles will be attracted to the...

a 500 kg satellite experiences a gravitational force of 3000 N, while moving in a circular orbit around the earth. a: find the radius of the circular orbit b: find the speed of the satellite c: find the period of the orbit attempt a: g= GM/r^2 r=sqrt(GM/g) r= 3.33 x 10^-6 m am i...

the Earth has a mass of 5.98 x 10^24 kg and the moon has a mass of 7.35 x 10^22 kg. the distance from the centre of the moon to the centre of the Earth is 3.84 x 10^8m. a rocket with a total mass of 1200kg is 3.0 x 10^8 m from the centre of the Earth and directly in between the Earth and the...

Gravitational force between everyday objects... I know It's a common question...but i could not find satisfactory answer...the question is "if every objects are attracting each others then why don't we see the daily objects attracting each others...?? Then how could Cavendish make his...

Homework Statement Here is the objective: To experiment with the resultant of two gravitational forces. In particular, you will find the equilibrium position for a test mass located on a line between two point masses. Here are the instructions: (1) Drag the test mass (red disk) to an...

1. Homework Statement Part One: Calculate the magnitude of the gravitational force between the Moon and an m = 6.45 kg mass on the surface of the Earth nearest to the moon. The distance to the center of the Moon from the surface of the Earth is 3.76×105 km and the mass of the Moon is...

Hello, our teacher told us that how could we find the gravitational force of the Earth, and i wanted to do it with falling objects (Only option i got, no pendulums). Does anyone have an idea what is a free-fall apparatus? I wanted to measure it just with a cronometer, but i need more precise...

What is the formula for calculating the gravitational force between two objects of a given mass? It's a really simple question. But I'm just a thirteen year old who desperately wants to know.

A) If the moon of mass mM has radius RM and the distance between the centers of the Earth and the moon is REM, find the total gravitational potential energy of the particle-earth and particle-moon systems when a particle with mass m is between the Earth and the moon, and a distance r from the...

Homework Statement What is the motion of a body thrown upwards from the Earth's surface, with escape velocity as it's initial velocity. Disregard the air resistance. Homework Equations v_e = \sqrt{\frac{2 G M}{x}} F_g = \frac{G M m}{x^2} The Attempt at a Solution I though this...

This isn't a HW question exactly, but I'm trying to model planetary motion and I've having trouble remembering something I learned a while ago when I took physics. I remember that the tangential velocity for a something to orbit a planet is v = sqrt(-G * M/r), but I need to decompose this...

(This isn't a homework problem, just something I've been thinking about.) Suppose we have two planets isolated in space separated by a distance "D." They exert a gravitational force on each other which changes as they get closer. If we were in the accelerating reference frame of one of the...

Why is the gravitational force normal to the path of a satellite, planet etc. ?

Sometimes we hear 9.8 m/s^2 and sometimes 10 m\s^2 ?? what is the most correct and how did they manage to find it?

Homework Statement If you double the distance between to masses, the gravitational force between them would:____ If you triple the distance between two masses, the gravitational force between them would be _______ the original force If you Halve the distance between two masses the...

Modelling Density as a Function of Many Objects Hello, My question is somewhat difficult to express but this is the best way I can come up with. Lets say I have a mass of material which has a charge throughout its entirety. This material has a very special property where the density of the...

how do we calcaulate the gravitational force of a marble with a mass of 3.66 grams

If two heavenly bodies are attracted towards each other by gravitational pull, then what stops them from colliding, as in Earth is attracted by sun's pull.

Hi. If Newtons theory of gravity was changed - so that gravity is considered to propagate at the speed of light AND not only masses but all energy feels and radiates gravitational attraction - would the predictions then be identical to the ones of Einsteins generel relativity?' Thanks, Henrik

The gravitational force on a baseball is −Fgjˆ. A pitcher throws the baseball with velocity viˆ by uniformly accelerating it straight forward horizontally for a time interval ∆t =t–0 = t. If the ball starts from rest, (a) through what distance does it accelerate before its release? (b) What...

Hi there! I'd like to calculate the work done by the gravitational force. I know the work is defined by the integration of a 1-form: L=\int_\gamma \omega where \omega=F_xdx+F_ydy+F_zdz This works fine in cartesian coordinates and I know how to integrate it, but what if I want to use spherical...