Weight Definition and 1000 Threads

Good morning forum, I'm currently in the middle of a project where I'm installing a new chemical storage tank outside. I need to lay a new concrete slab for the tank to lay on. My question is how thick should the concrete slab be? The tank will be stationary, when filled it will weigh...

What determines the maximum amount of weight an electric motor can lift / move for its size? So assuming the electric motor weighs a specific amount, what would be the limiting factor to how much weight it can move / lift for the weight it weighs?

I wasn't exactly sure which forum I should post this question in but I felt this was the most appropriate one. So if there is a more appropriate one, feel free to relocate it (whoever is responsible for that). I wanted strictly a scientific answer to this question. How does weight affect a...

Is there a way to determine how many amps / watts is required from an electric motor in order to move (lift, push or pull) an object weighing a specific amount? Conversely, is there a way to determine the maximum amount of weight an electric motor can move (lift, push or pull) based on its...

Homework Statement The problem is stated in the picture. Homework Equations Fg=Gm.1m.2/r^2 The Attempt at a Solution I found a similar question where someone wanted to find how high will the weight be half the weight on the surface. Here is one of the answers: F =G.m1.m2/r^2 F´ =G.m1.m2/r´^2...

Hi all, Since the gravitational acceleration varies depending on location, then how do you know if your scale is precisely calibrated? If I use a calibration weight (e.g. 100.000000 g) that was manufactured and tested around at equator where g=9.780 m/s^2, in my lab at the north pole where...

Why do the time-evolution operator in quantum mechanics ##\exp{iHt}## and the Gibbs-weight operator in statistical physics ##\exp{-H/T}## have the same functional form? – i.e. both exponentials of the Hamiltonian operator. The Matsubara trick/method just takes this as a fact in thermal QFT; but...

Homework Statement The board shown below is being held in equilibrium in the vertical plane by three smooth rods at A, B, and C Determine the magnitudes of forces at A, B, and C in terms of the weight of the body, W. Homework Equations Moment = f*r Here's a diagram The Attempt at a...

Hi. I’m trying to build something and having very little basic physics am having to try and learn as I go along. Today I spoke to a company that makes damping units and I was asked how much force in Newton meters would be applied to the unit at the top speed. It’s a small cart weighing 70Kg and...

Homework Statement https://ibb.co/g6iKDQ Calculate the magnitude of the force on cables 1 and 2 in the figure below if θ_1 = 55° and θ_2 = 35°. (Round your answers to two decimal places.) Homework Equations Is my method incorrect or did I go wrong somewhere in my calculations?? The...

Let say I have a 4,000 lb. camper with two axles (four tires). There is 400 lbs. of tongue weight on the hitch which would leave the remaining 3,600 lbs. distributed to the four tires (900 lbs./tire). To keep it simple, let's say the weight of the camper is distributed equally left and right...

Homework Statement How does the gradient of the graph compare to the weight force? The graph is a Mass vs 1/Acceleration graph (y axis = mass, x-axis = Acceleration, It was mentioned to do this.) Homework Equations Explain by referring to the formula for Newton's Second Law. The Attempt at a...

Hi all, I am not sure this is the right forum, but I guess my question fits better here than in classical physics. I am building a lightweight flooring in my utility room to store some "not very heavy" items. Two years back when my house was being finished, I installed two wooden wall plates...

Homework Statement I am trying to perform a weighted fit of a data set ##(x,y)## shown below. The only information I have are the two vectors ##x## and ##y## and the uncertainty present in the ##y## values (##=0.001##). Homework Equations The Attempt at a Solution Statistical weighting of...

Admin please don't delete, this is not homework nor part of any curriculum A water tank put on scale measuring 50 Kg , inside the tank a fully submerged balloon tied with a thread to the tank bottom. if the thread was cut, will there be a different reading on the scale (momentarily until the...

I am wanting to use some Werner Aluminum ladders as a surface to skid a refrigerator-sized object that weighs around 1500 lbs. across a lawn. The plan is to lay some 3/4 ply down on the ground creating a surface, then lay two ladder sections side by side & equal distance apart as "tracks" where...

So I have a question that I figure there is a simple equation for but I don't know what it is and when I have done some tests I see that the equation may not be a simple as I thought. Any help with find the equation to this question is much appreciated. Situation: - I have a bar that is solid...

Homework Statement I want to find the angular frequency of the system below Homework Equations F = -kx U = 1/2*k*x^2 The Attempt at a Solution But here's the answer: I don't know how come this solution. Any one help me? Thank you so much.

This is probably kind of a simple question but it is one that I have questioned for quite some time. Please see the drawing. Does the position of the 100lbs effect the MA or leverage in this simple lever system?

Homework Statement -[/B] What is the weight of air on a piece of 8 1/2" x 11" piece of paper? Assume you're at sea level. Homework Equations [/B] None.The Attempt at a Solution All I know is atmospheric pressure is 14.7 lb/in2 at sea level. I have no idea how to go about calculating this...

Very dumb classic mechanics question here: The other day I caught sight of a trivial objects arrangement: a basketball placed on top of a 6-sided cardboard box on the floor, and I wondered how the weight of the hollowed sphere could cause bending on the supported, flat top surface of the box...

Simple question. Can a magnet have more push force than the magnet itself weighs. Example: A magnet weighing 2kg having a push force equal to 3kg.

Homework Statement A person exercises daily by lifting weights. When he lifts a weight, he is exerting a force on it to displace it. This means he is doing work and therefore burning calories. But when he lowers the same weight, does he do any work and burn calories? Homework Equations W = F x...

I seem to be stuck in a rut and so I was hoping you guys could help me out with this should-be easy question.. The pontoon dimensions are (L x W x H) 114.84m X 15m X 3.4m. Made of concrete. There is about 1m of freeboard so I figured using the water displacement, the structure weights about...

Hello, My question is simple. Let's suppose you have an electromagnetic coil with a magnetic weight in the center of it. This coil is energized, and the weight is lifted up vertically. Now, my weight is 30 kgs. I want to lift it to a height of 1 meter. How do I calculate how much power is...

simple question, please tell me if my understanding is correctly or not ------------------- our body mass can't come form nothing, it have to come from 'food' we eat. so, If I'm eat 100 gram of food, no matter how high calorie that food is, I never gain weight more than 100 gram. correct...

According to Wikipedia: Mechanical advantage is a measure of the force amplification achieved by using a tool, mechanical device or machine system. Ideally, the device preserves the input power and simply trades off forces against movement to obtain a desired amplification in the output force...

Homework Statement we did a quiz in my dynamics class, it was very easy i think but there was a problem where we had to find the speed of an object attached to a spring, but that is not my question. The mass had 8 pounds, and the spring constant was in inches, the measurements in inches. To...

Hi everyone, I am new here... please forgive me if my posting is imperfect :p I am planning to purchase a glass aquarium with tank dimensions: 48" (Length) * 24" (Depth) * 22" (Height) I wonder if a wooden stand with only edge support will be able to withstand the weight of the filled...

I'm trying to deduce the weight of 1 atomic mass unit (##1u##) in ##kilograms## from the following scenario: One atomic mass unit is 1/12 of the weight of a ##^{12}C## atom in its ground state. A ##^{12}C## atom consists of 6 protons, 6 neutrons and 6 electrons. This means that $$1u =...

Homework Statement Calculate the weight of each member of the truss structure. Homework Equations density = mass/volume The Attempt at a Solution This is part of a lab that we are doing in my mechanics of materials course. I have designed a structure, and I must calculate the weight of each...

Hello! I am an AP Physics student and had a quick question for validity. I was prompted with this question in class today: Example 7: An 8-meter ladder of weight 355 N leans at an angle of 50° to the floor against a smooth vertical wall. Assume the center of weight (gravity) for the ladder is at...

I have a 2x4 on it's edge that spans 10 feet in my ceiling. I want to hang a swing that can hold 250 pounds near the center of this span. What would I need to do in this situation in order to get minimal or no deflection?

I'm trying to design some novel cross bow designs and also trebuchet's with the trebuchet (similar to catapults to those who don't know) using springs or a combination of weight and springs. I'm looking into using linear springs and pullies for the crossbow depending on whether they can be...

Homework Statement A car is on a ramp of angle theta with the horizontal with the front of the car pointing up the ramp. Its weight distribution is uneven so that more of its weight is towards the rear of the car therefore the center of mass is closer to the rear of the car. The car is very...

I was wondering - if you had a container of water and you push a hollow object that is buoyant to the bottom so that it is completely immersed - the whole container will be heavier because of water being displaced up in the container. Now if you release your hand or whatever you use to hold the...

Homework Statement A cyclist rides along a road up an incline at a steady speed of 9.0 m s–1. The mass of the rider and bicycle is 70kg and the bicycle travels 15 m along the road for every 1.0 m gained in height. Neglect energy loss due to frictional forces. Calculate the component of the...

Homework Statement A ball with mass of m starts sliding off a ramp with height h = 3R and when it slides off the ball does a "loop" once. ( Just see the picture , it's hard to explain :biggrin:). I have to find the weight of the ball at the bottom and at the top of the circle. h = 3R Homework...

Looking for effective weight lost or horsepower gained... Original wheels weighed 29 lbs front wheels 20" x 10" rear wheels 20" x 11"New wheels weigh 22 lbs front wheels 19" x 10" rear wheels 19" x 11"for the purposes of the exercise I will assume tire weights are the same since the side wall...

Homework Statement A 1.60-m string of weight 1.30 N is tied to the ceiling at its upper end, and the lower end supports a weight W. When you pluck the string slightly, the waves traveling up the string obey the equation y(x,t)=(8.50mm)cos(172rad⋅m−1(x)−2730rad⋅s−1(t)) a) How much time does it...

Homework Statement Assume that the beaker is half filled with Hg, the steel ball being lighter will float in it half-submerged. Now we pour water into the beaker, so that the beaker is completely filled with water on top, Hg in the bottom and steel ball floating between them. Now my question...

The weight act on me and the normal force act on me should be canceled out, so where does the sense of weight come from?

Homework Statement A landing craft with mass 1.22×10^4 kg is in a circular orbit a distance 5.50×10^5 m above the surface of a planet. The period of the orbit is 5100 s . The astronauts in the lander measure the diameter of the planet to be 9.50×10^6 m . The lander sets down at the north pole...

Homework Statement A 0.100-kg, 59.9-cm-long uniform bar has a small 0.055-kg mass glued to its left end and a small 0.100-kgmass glued to the other end. You want to balance this system horizontally on a fulcrum placed just under its center of gravity. no diagram given Homework Equations Στ = 0...

Homework Statement I know that on a horizontal surface. if the net force is 0 in the y direction the weight of object=the normal force, but wouldn't the normal force always equal the magnitude of gravity on an object, just in opposite directions? Because if the weight is stronger than the...

I have 5 boxes and I am displaying the amount of hours it takes to complete 3 different steps with the materials inside said boxes (you don't need it, but its item removal, rebagging, and consolidation). However, there are different amount of bags inside each box, and I need to make a comparison...

Hi, Excuse me this is probably a really stupid question but I ask because I thought that the definition of the dimension of a space is the number of elements in the basis. Now I have a theorem that tells me that ## dim M_{k} = [k/12] + 1 if k\neq 2 (mod 12) =[k/12] if k=2 (mod 12) ## for ## k...

I am NOT a physics major and clueless to figure out the strength of a custom spring I need to be made. I was hoping someone could help me, either with figuring it out, or turning me to someone/site that may be able to help. Here's the sitch': The spring is for a center kick-stand on a bicycle...

Homework Statement The maximum torque on a lever is 1.5 x 10^6 Newtons. How many people of weight 750N can stand evenly spaced on this lever, which has a length of 20 meters? Homework Equations T=FR Weight=mg W=Fd X = Number of people The Attempt at a Solution I have set 1.5x10^6 N =...

I am tying to find out how much weight I can support with a piece of plate steel (A514) that is supported only on the three edges. The open span would be 30" wide 36" long and .500" thick. I need to know what the maximum amount of weight I can support with .250" or less deflection. Can anyone...