What is Pull: Definition and 326 Discussions

What is the work done by the two forces together in moving an object a distance of d = 14 m as shown in the diagram? The magnitude of each force is 7 N.

Homework Statement A block with eight of 455 N is being pulled at constant velocity by a force directed at 30 degrees above the horizontal. The friction force on the crate is 1163 N. What is the magnitude of the pulling force? Homework Equations Ft= kx Fnet= ma The Attempt at a...

I need to caculate the Pull in LBS of Electromagnets, i am missing some information regarding this & maybe some brain cells also. B (Flux Density)= Flux Lines/ Area Pull in LBS= B x A / 72,000,000 Ok, how do i get B Flux Density in lines per sq/inch for the calculation. I guess it...

*despite the current economic situation* im trying my hardest to transfer out in a year. definitely OUT of state, i reside in new jersey. i need a car and I am quite dead set on a certain one. to be specific, a jazz blue 20th anniversary VW gti. but, the problem is the fact that i simply...

Suppose you had a very, very large black hole, so large that the tidal forces at or near the event horizon were not fatal. If you lowered someone down via a very long indestructible cable past the event horizon, and you held your spaceship sufficiently far away from the black hole to ignore its...

I'm trying to work out the amount of charge needed for atoms to leave the surface of a solid. Here's the scenario, if we have a solid, say a metal for example, and we take some charge out of a certain area of the metal so it is just leaving the surface of the metal, we have a space charge...

Beverage engineering. The pull tab was a major advance in the engineering design of beverage containers. The tab pivots on a central bolt in the can's top. When you pull upward on one end of the tab, the other end presses downward on a portion of the can's top that has been scored. If you pull...

There are two objects with the distance of r apart . because of the gravity , these two objects start to get closer to each other and then they get to each other (actually they fall on each other) .So my question is how long does it take for them to get to each other? Thank you

Newton’s Third Law. “To every action there is always opposed an equal reaction: or, the mutual actions of two bodies upon each other are always directed to contrary parts. “Whatever draws or presses another is as much drawn or pressed by that other. If you press a stone with your finger, the...

An infinitesimally thin rope is held on a frictionless table with one-fourth of its length hanging over the edge. If the rope has length L and total mass m (assuming uniform mass distribution), how much work is required to pull the hanging part back onto the table. U = mgh The length of...

Homework Statement A skier of mass 69.5 kg is pulled up a slope by a motor-driven cable. a) How much work is required to pull him a distance of 59.1 m up a 30.1° slope (assumed frictionless) at a constant speed of 2.07 m/s? The Attempt at a Solution I started out this problem by finding...

This is incredibly ignorant (and worse, the result of a drunken conversation), so I apologize in advance, but: If you worked out the mass of an average human being, and suspended them in space at the average distance of the Earth to the Sun (but subtracting the existence of the Earth and...

Homework Statement A uniform cable hanging over the edge of a tall building is 40 ft long and weighs 60 lb. How much work is required to pull 10 ft of the cable to the top? Homework Equations Density=3/2 ft/lb The Attempt at a Solution Ok, the problem is this: I can solve this...

[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...

Hi all, I am an aspiring chemical engineering student. However, I don't feel that I am smart enough to go into such a profession. Reason is that i have deficiencies in logical reasoning and I seem to confuse myself a lot (a lot lot), i also lack common sense. I have a difficult time...

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...