Weight Definition and 1000 Threads

Homework Statement A safe (mass = 1.00*10^3 kg) is suspended a height (d) above the top end of the spring (spring constant = 27800 N/m). The rope holding the safe breaks and the safe falls, compressing the spring a total distance of 1.80 m. What is the initial height (d) of the safe when it...

Homework Statement Air consists of a approximately 78% Nitrogen in volume,21% Oxygen and 1% Argon. The atomic weight of Nitrogen is 14, that of Oxygen 16 and that of Argon 40 (1) Nitrogen occupies air in weight by (a) 76% (b) 77% (c) 78% (d) 79% Homework EquationsThe Attempt at a Solution I...

Its pretty tough to calculate the entire mass and weight of entire black hole.But how we will give a approximate value? How we will calculate its mass and weight? Could you list some stuffs that caught into the black hole? Has any scientist ever visited a black hole and collected data on it...

Homework Statement 1) calculate the longest length of steel wire that can hang vertically without breaking .breaking stress for steel=7.982*10^8N/m^2 and density of steel(d)=8.1*10^3kg/m^3.2)A bar of mass m and length l is hanging from a point A as shown in the figure.Find the increase...

Information Given:In 1956, Frank Lloyd Wright proposed the construction of a mile-high building in Chicago. Suppose the building had been constructed. Question: Ignoring Earth's rotation, find the change in your weight if you were to ride an elevator from the street level, where you weigh 708...

Hello everyone, First off, i would like to apologize for any spelling errors. I am Portuguese and my english is going to be very simple. I am in the process of building something and i am reaching out to the physics community for help solving a problem. I am a CNC programmer and while i was in...

An aluminium weight (B) is placed on top of a 0.472 kg wooden block (A) that is floating in water as shown below. The wooden block has a density of 533 kg.m-3 (3 s.f.). Calculate the required mass of the Aluminium weight to just fully submerge the wooden block as shown in the diagram. The...

I'm in the process of purchasing a sailboat for open ocean cruising and would like to understanding how a mass (say 1kg) mounted at the top of the mast affects the center of gravity, assuming that the COG is at a known location relative to the waterline.

What is the difference between 1 kgf and 1 Newton?

So an object unaffected by any gravity free floating in space has zero mass. Now could this object reach light speed. Or am I confused?

Homework Statement Calculate the molecular weight of Al2(SO4)3.14.3H2O Homework EquationsThe Attempt at a Solution May i know how to do this ? Does it mean 14*3 = 42(H20) , where there re 84H , 42O atoms ?

Homework Statement This problem comes from the Feynman Lectures. However, the author doesn't explain in detail the procedure to solve the problem. I have to calculate the weight W using only the law of energy conservation. Homework Equations In the second picture W it is lowered of 5...

for those Who Dont know golf. Swing weight is a measurment how Heavy the clubhead Feels. If i put on a heavier grip the swingweight falls. Heavier head swing weight goes up etc. If i Want to swing the Club with as little clubhead rotation as possible (i know forarm creats the rotation) Would i...

I don't know if I have to include the weight of a gear in order to proceed on computing the forces acting on the plane of line shaft. If I have to determine it, how do I calculate the weight of the gear (spur gear)?

I have a problem where I have a large mass on wheels that I want to power with an electric motor. My hope is that I can find the torque i need to start and drive the motor and this is what I have so far. Mass = 400t. Initial velocity = 0 Final velocity = 2.5m/s Distance required to travel =...

I've tackled a lot so far! I've created methods to delete, get the weight, and sort the tree by name. My goal is to have my switch criteria change how the tree is sorted, either by weight or by name. I haven't figured out how to implement it within my switchCriteria() method, so I've been...

Hi and thanks if you decide to go through this post. As part of a school project I'm analysing a weight stack selector pin used in various fitness training equipment. Its material, length and diameter are known. 1. Homework Statement The pin is placed into a hole equal to its length (from the...

Homework Statement The problem relates to the subject of torque and angular momentum: A man of mass ## M ## stands on a railroad car that is rounding an unbanked turn of radius R at speed v. His center of mass is height ## L ## above the car, and his feet are distance ## d ## apart. The man is...

If I were able to accelerate a particle to relativistic speeds, then capture that particle in a box in such a way that it kept its speed, then weighed that box, would it weigh more than the box + rest weight of the particle? Would it exert a gravitational field greater than that of the box with...

Hi, I'm new here. Could someone provide some guidance on how to start this problem?

Homework Statement Hello, there is a cylinder with cross sectional area 10cm2. The cylinder has a length of 50cm partially submerged in water and floats upright. Taking acceleration due to gravity as 10 m s-2 and the density of water to be 1000 kg m-3 Find the weight of the cylinder using...

Homework Statement An object is suspended on a frictionless slope inclined plane by a rope parallel to the incline. If the angle of the incline is 25° and the tension on the rope is 5000 N, what is the weight of the object Homework Equations ∑F=0 The Attempt at a Solution So in my eyes, you...

https://www.sciencedaily.com/releases/2018/01/180116093650.htm This article gives a maximum weight of 2.16 solar masses, and an infinitesimal addition would turn it into a Black hole. I can not find a paper to support this article so do you think it is correct?

Homework Statement What is the apparent weight of a 70-kg astronaut 3800 km from the center of the Earth's Moon in a space vehicle when a) Moving at a constant velocity b) Accelerating toward the Moon at 2.9 m/s^2? State direction in each case Homework Equations wt = m(g+a) wt = m(g-a) Fgr =...

Let's say I'm riding a bike at constant speed. Also assume that the person riding is rigid, no moving of the persons body, constant center of gravity. Assuming that there is sufficient friction between the tires and road. If I apply the front brakes, I will likely tip over. If I apply the...

Homework Statement I want to check steel weight with formula, and I find it via google. Homework Equations Here is it: https://machinemfg.com/steel-weight-calculation-formula/ The Attempt at a Solution Hope you guys to help me check does above formula is correct. Many thanks in advance.

Many years ago I was given a problem involving the calibration of sets of weights. Each of two sets consisted of weights of 1.0 kg, 500.0 g, 300 g, 200 g, and 100 g. The two 1.0 kg weights were calibrated by the international agency in France and I was permitted to assume that their masses...

A hollow cylinder (2 tons) is dipped in a chemical tank using hoist crane for treatment purpose. Can anyone please help me to show how to calculate the maximum weight of the submerged hollow cylinder when it is being pulled up because I need to choose the correct lifting capacity for the crane...

aren't you supposed to measure weight in Newtons? And mass in kilograms/grams?

Homework Statement A rocket during launch from the Earth's surface moves vertically with an acceleration of 22m / s ^ 2. Find the cosmonaut's weight inside the cabin if his mass is 90kg. Homework Equations The problem belongs to "Elasticity. Moving under the action of elastic force" chapter...

Hello, I am working on a project where I am trying to find the weight distribution on a 4 wheeled vehicle that is traveling diagonally up an incline. You can effectively think of the vehicle as having a pitch and a yaw angle in the body frame. Using an arbitrary location of the total center of...

So basically i was solving this question about moments amd while solving it i noticed that beam will always remain balanced as FA will decrease and FB will increase as the man moves forwards thus plank alwats remains in equilibrium but now the question is can it support any weight without...

I haven't had a chemistry class in many years. Recently I saw an interesting article that used a solution of resveratrol (228.25 grams per mole) in dimethylsulfoxide (78.13 grams per mole). The concentration was listed as 5 uMol. If I had 10 grams of DMSO how much resveratrol would I add to...

I've got a problem where a weight is being held to the side of a building using a beam and a cable. The weight is 336 pounds and the angle between the cable and the beam is 49 degrees. I need to calculate the tension of the cable and the force of the beam. I calculated the force of gravity as...

Hello, I have been looking at physics calculators, but cannot seem to find precisely what I need. I don't need a very precise answer, merely a realistic ballpark one. I need to know how we find the rough speed of an object's movement when a certain amount of force is applied to it. For...

Why does increase in machine weight doesn't have much effect on clutch's power and energy? I do understand weight is basically normal force, and increase in normal force should make it harder for the transmission to push the increased amount of torque? What is the math behind it?

Hello, I have a tennis racquet that has a certain weight distribution that makes it play very well. Due to quality control issues from the manufacturer my second racquet of same make and model has a very different weight profile, making matching difficult. I'd like to determine the weight...

Homework Statement Hi. I ve got a problem, where I have to show torque by integrating the weight of the rod over the whole it's length. Homework Equations [/B] Result, what I am suppose to get is: ## \tau_{rod} = \frac{mgb}2 ##The Attempt at a Solution [/B] When I try to integrate, I am...

<Moderator's note: Moved from a technical forum and thus no template.> Hi all, This is a simple system. Assume the weight is completely balanced on the wheel (not going to tilt to any direction). the weight (red block) weighs 200 kg. the wheel (2 of them) each weighs 4 kg. how to calculate...

The door fixed by hinges is in rotational equilibrium.Then why torque due to its weight is zero

Most hitches are rated as "X, 0.1*X weight-bearing, Y, 0.1*Y weight-distributing" where Y > X and the first number is trailer weight, second number is tongue weight. It has been described to me many times that the weight distributing hitch (with 'stabilizing/leveling' bars) "takes weight off...

Say you were on a steel ship, standing on very thick steel. Would you technically weigh more? Would the gravity pull you down more?

Edit: thread moved from non HW forum. I'm trying to calculate the unit molecular weight of polystyrene. I'm given the structure, and I have to count all the elements in the structure. To calculate the weight, I keep counting 8C & 7H. The correct answer is 8C +8H. I'm having a hard time...

Homework Statement Hi There, I'm having trouble understanding (what I guess should be) a simple concept and so I can't apply it to a project I'm working on (also kind of rusty on torques and mechanics problems) If I have a hinged beam (of uniform weight) and I lift it from one end and stay...

I have read on the internet that if an object rests on a table, that object will exert the force of its weight on the table. But, for some reason, that doesn't make sense to me. If I have a 10 kg book that rests on a table, the gravitational force on that object will be 98 N. If gravity is...

In reading Jules Verne's book A Journey to the Center of the Earth I came to a section where one of the characters questions if the massive weight of the air would be fatal at the center of the Earth. I lack the mathematical skills to derive an equation to graphically represent the results. My...

Hi at all, I've a curiosity about the role that the weight function w(t) she has, into the define of adjoint & s-adjoint op. It is relevant in physical applications or not ?

Homework Statement Hello, I am calculating the uncertainty for a course I am in. I am specifically calculating the uncertainty for the weight of coins in my experiment. Homework Equations The weight of coins in my experiment is equal to the number of coins I used in the part, multipled by...

Hello, My name is Hugh Carstensen. I am a CSE undergrad at the Ohio State University. I recently secured a position designing and assembling an automated camera-rig for digitization of archival works in the Knowlton School of Architecture. The rig will be powered by a number of small stepper...

Due to the square cube law there is a limit to how large an animal can be. I believe sea animals are capable of being much larger than land animals because the water supports their weight but what is the theoretical limit to how large a land animal can be and a sea animal? Excluding food...