Pull Definition and 312 Threads

[SOLVED] Yank and Pull - String Tension Problem Homework Statement A heavy object (of mass ~10kg) hangs from a hook by a light string. There is another light string of equal configuration (mass, length, etc) hanging down from the object. Pulling on the string slowly will cause the top...

[SOLVED] Ratio of net gravitational pull on moon A new moon is almost exactly in line between the Earth and the sun. A full moon is on the opposite side of the Earth from the sun. What is the ratio of the net gravitational force on the moon when it is new to when it is full? I tried...

[SOLVED] Mininum Work to Pull Crate Homework Statement A student could either pull or push, at an angle of 30 degrees from the horizontal, a 50 kilo crate on a horizontal surface, where the coefficient of kinetic friction between the crate and the surface is 0.2. The crate is to be moved a...

How far from Pluto must a space probe be along a line toward the Sun so that the Sun's gravitational pull on the probe balances Pluto's pull? I know that Fs=Fsp and that when i elminate terms i get ((Rsp-x)/x)^2=(Ms/Mp) i uncderstand the mass of pluto to be 1.3e22 kg and the mass of the sun...

Homework Statement On the way to the moon, the Apollo astronauts reach a point where the Moon's gravitational pull is stronger than that of the Earth's. Find the distance of this point from the center of the Earth. The masses of the Earth and the Moon are 5.98e24 Kg and 7.36e22 Kg...

If a glass of water is resting on a table and there is a piece of paper or cloth or whatever under the glass, and you pull the paper/cloth really fast, the glass does not move. Can someone please explain the physics of this to me. THNX

I'm working on a project for school and I have to come up with a system where a pulled object moves twice as far as the object doing the pulling. I think I've seen a pulley system that can do this, but I can't remember where. If anyone has any suggestions, I would greatly appreciate it.

Short question; Matter attracts matter, black holes even attracts light. If all matter in this universe was together, wouldn't that create big enough gravity to never let that matter go? Or would it create some kind of implotion? Or how could Big Bang be? (Sorry for my bad english, and maybe...

Calculate the force required to pull a copper ball of radius 3.00 cm upward through a fluid at the constant speed 9.00 cm/s. Take the drag force to be proportional to the speed, with proportionality constant 0.950 kg/s. Ignore the buoyant force. For this question, do I have to find the mass of...

i have a 230lb weight i need to lift 12feet in the air. i have a 2 1/8 inch dia. pulley directly above it, and then 17 feet horizonally i have a 3 inch dia. sheave block. Than i drop straight down 25 feet to another 3 inch dia. sheave block which is turned at a 30 degree angle to the sheave...

Homework Statement According to legend, a horse learned Newton's laws. When the horse was told to pull a cart, it refused, saying that if it pulled the cart forward, according to Newton's third law there would be an equal force backwards. Thus, there would be balanced forces, and, according to...

I can "understand" the gravitational pull of the sun on the Earth and the Earth mass effect toward the moon, but what pull the sun? a neophyte.

Homework Statement A 2m long, 600g rope pulls a 10kg block of ice across a horizontal, frictionless surface. The block accelerates at 1.7m/s^2. a.) How much force pulls forward on the ice? b.) How much force pull forward on the rope. Homework Equations The Attempt at a Solution...

Homework Statement Problem from Fluid Mechanics (Streeter, McGraw Hill, 9th ed.) 1.70 A method used to calculate surface tension of a liquid is finding the force necessary to pull a platinum ring out of the surface of that liquid. Calculate the force necessary to pull a ring with a 20mm...

how can wec trace the origin of push and pull to electromagnetic forces? I mean when we push a thing what actually are we doing? What are the atoms at the contact surface actually doing?

Hello, My girlfriend asked me this question - how far from Earth do you have to be before you don't really feel any gravity from it anymore? I suppose the question to ask is - how negligible does 'don't really feel' actually mean ... After a bit of thought I think one way of defining...

shouldn't an object that is being push away from Earth with the same force accelerate as it goes up in elevation, also would not temperature have an affect on the object gravitational pull

Homework Statement Part of a single rectangular loop of wire with dimensions shown is situated inside a region of uniform magnetic field of 0.55T. The total resistance of the loop of 0.230ohms. Calculate the force required to pull the loop from the field (to the right) at a constant velocity...

does the moon pull on the Earth with one-sixth the force that the Earth exerts on the moon?

Hi there, I have been reading a book in which the author gives me a result of his calculation and I am trying to work it backwards to prove whether he is correct. On July 20, 2005 he states that the combined forces pulling on Earth was 285.8 degrees. He mentions the gravitational formula...

Does Earths gravitational pull intensify when it has an object to draw upon? hq2u

Hi, I have a permanent magnet (actually, an assembly of permanent magnets). I can calculate magnetic flux density induced by the magnets (when no other objects presents). Now, I have very small iron particles suspend in water inside a cup. The magnets are then placed on the outside wall...

Just want ot see the majority opinions

Please; 12.5 kiloGauss = how many lbs pull . I want buy a bunch of 3/8" x 1/4" NEODYMIUM magnets. Some sellers designate Gauss, other lbs pull. Also, any tips on where to buy? Thanks!

Me and a friend are having a dispute after watching the movie Underworld : Evolution. There's a scene in the movie where a character literally pulls a helicopter out of the air by pulling its fast rope straight down. Now I know it's Hollywood, but I started laughing at the reality of such an...

A 1-kg mass at the Earth's surface is gravitationally attracted to Earth with a force of 9.8 N. Calculate the force of gravity with which the 1-kg mass on Earth is attracted to the moon. (The moon's mass is 7.4 x 10^22 kg) Would this be setup correctly? F=(G me mb)/r^2...

Homework Statement A 17N spool has an outside radius of 20 cm and an inside radius of 6.4cm as shown. What horizontal force on the rope(wrapped around the inside radius) will be required to pull the spool over an 11cm edge? http://img299.imageshack.us/img299/6105/27kl1.png Homework...

The Earth is subject not only to the gravitational force of the moon but also to the gravitational pull of the sun. However, the earth is much farther away from the sun than it is from the moon. In fact, the center of the Earth is at an average distance of 1.5 x 10^11 m from the center of the...

How far from Earth must a space probe be along a line toward the Sun so that the Sun's gravitational pull on the probe balances the Earth's pull? I'm actually just confused as to how to set this up. I know that I need to consider d being the distance from the Earth to the sun and r being the...

The problem is I have two blocks on an inclined plane. They are connected by a metal rod. The bottom(2) mass provides the dominate force. Fiction is involved. They have different kinetic coefficients of friction. I need to know the acceleration of the system and the tension in the rod...

if the sun was to vanish, what would happen to the earth. I've been told that the Earth would still rotate around as if there was a sun, was atleast 8 minutes because that's the time it take for the sun's light to reach the earth. Since nothing is faster than the speed of light, the Earth will...

I found the following posted in another forum: He did not cite the source. He suggests that this is related to Relativity. I'm no relativity expert but I doubt the authenticity of his claims, especially the part that the rotation of a planet affects its gravitational pull. What do you think?

The answer is it is easier to pull a lawnmover than to push it. I understand it logically but how do you prove it? My teacher says it has something to do with resolution of vectors. Can someone please explain?

if we were to tie a rope around the moon and have the end on earth. what would happen if we were to pull the moon? could we actually pull it closer until it eventually collides with earth?

A mass M whirls around on a string which passes through a ring .Neglect gravity.Initially the mass is distance Ro from the center and is revolving at angular velocity Wo.The string is pulled with constant velocity V starting at t=0 so that the radial distance to the mass decreases.Draw a force...

Ok, I already posted this a few days ago but I am bringing it back because i don't quite understand a man sits in a bosuns chair that dangles from a massless rope, which runs over a massless frictionless pulley, and back down to the mans hand. The combined mass of the man and the chair is...

A chain is held on a frictionless table with one-fourth of its length hanging over the edge. If the chain has length L= 28 cm and mass m=0.012 kg, how much work is required to pull the hanging part back onto the table? I have used this model: W horizontal + Work due to gravity = Work...

After the London Bombings, American Forces have been told not to venture near the Capitol:http://news.bbc.co.uk/1/hi/uk/4673987.stm Is this the first sign of 'Defeat' against terrorism?..or am I reading it wrong, maybe it's the first sign of Terrorism gaining the upperhand? If London is...

A claw hammer is used to pull a nail out of a board. The nail is at an angle of 60 degrees to the board, and a force F1 of magnitude 500 N applied to the nail is required to pull it from the board. The hammer head contacts the board at point A, which is 0.080 m from where the nail enters the...

Hi everyone, sorry if I'm new to this and this subject have already been posted, but i have a test tomorrow, and i need help. The question is that when the sun, the moon, and the Earth are in a straight line, with the moon is in between the sun and the earth. It is reasonable to think that the...

I think that the title of the topic is very self explanatory. I want to know what the explanation is for the different implementations, I reckon that it might have something to do with the density of air and water.

an example problem statement there is a rod and we pull one end of it with a 10N force with the other end fixed. recall that a force acts on a body only when it accelerates. But in the above problem is it correct to say that 10N force is applied (i see that there is no force applied on it...

anyone know the distance from Earth (to the moon) where the gravitational pull of the moon is equal to the gravitational pull of the earth? (or any way I could calculate it?) :confused:

A 12 kg sled is pulled along at a constant velocity on a horizintal surface by a horizontal force of 11N. How much horizontal force is needed to pull the sled at a constant velocity it two 57 kg girls are sitting in it? How would I go about solving this? Thanks, Amanda

A man is puling a box across the floor. Assume that the force of friction can be ignored and that the acceleration of the box is 1.27 m / s^2. Find the angle to the horizontal that the man must pull. Given that the mass of the box is 15 kg. and the tension of the rope is 65N.

Hi Lets say you have a 100' tree and you have the pull line going through a fork up the top. You have 2 options of where to tie it ... A/ Tie to the top fork (running bowline etc) B/ Tie off on trunk at base My question is, is it the same? Before you answer please consider that...

Please help me out with this question ... While using a wheelbarrel to move heavy logs, you bump into a log laying across your path. Would it be easier to pull or push the wheelbarrel over the log blocking your path? And, why? :smile:

What is the maximum pull a normal magnet (non electromagnet) of about the size of a computer mouse could achieve? And how would the cost of this compare to the cost of an electromagnet of the same pull? Also, will an electromagnet achieve it's desired pull immediately when the circuit is...

What varibles might be need to find the force necessary to pull a car on to a tow truck at an angle?

a horse pulls a barge along a canal using a rope 10m long. if the barge is 2m from the bank, the rope is taught and the tension in it is 500N. what are the components of this force at right angles to the canal? i worked this out to be 99.7N i used 500 x sin 11.5 (the angle between the rope...