Force Definition and 1000 Threads

In my approach, i have ##F_{Resolved} = 300 \cos 60^{\circ} = 150## Newtons. I also have, ... from ##v=u +at## ##2=0 +6a## ##a= \dfrac{1}{3}##. ##F=ma## ##F=30 ×\dfrac{1}{3} = 10## Newtons Therefore, ##P= \dfrac{(150+10) ×6}{6} = 160 ## W Insight is welcome...

So I labelled all the springs from 1 to 4. Since the force is gradual, at equilibrium : ##F = k(x_2+ x_4) - - - - (1)## Now we need to relate the different extensions of the springs: ##kx_1 = kx_4## (same string) ##x_1 = x_4 (2)## ##kx_2 = 2kx_1## ( ideal pulley) ##x_2 =...

I tried a method solving for the force of the wind first which I found to be 2842.95 N. From there I found the torque force using torque = F_wind x d, where I let d = 90ft. This leads to a torque of 77987.8044 Nm. From there I used Tension = torque/moment arm, with a moment arm of 20ft (half of...

I was reading this A-level mechanics book by L. Bostock and S. Chandler. The chapter was momentum and in it, there's a section about instantaneous impulse. It says "There are many occasions when a force acts for so short a time that the effect is instantaneous, example a bat striking a ball, in...

I wanted to put a 39-pound tv on this tv stand: https://www.ikea.com/us/en/p/lack-tv-unit-black-brown-00566060/ The weight limit of top shelf is 35 pounds, but my tv weighs at 39 pounds. Is there any way I can adjust the force distribution so the shelf can hold my tv? tv has 2 base legs about...

I had made a silly inattention mistake. Once corrected everything worked out. I have updated the pictures to show the correct answer.

By looking at the following question, I have no idea why the direction of force exerted by rod on a ball is represented like that. can anyone help me to understand?

Tension force = 10lb[W] where do i put tension arrow in the full body diagram

Hello All, I'm trying to figure out the above problem but don't know how to set it up and could use some help. For starting with the first question, I was thinking of doing PE = KE: PE = mgh = (10,000)*(9.81)*(1) = 98,100 kJ KE = 0.5m (v^2) = 0.5 (10,000)* (v^2) Sqrt(98,100 / 5,000) = 4.43...

Hello everyone, I’m working on a theoretical model for a sound wave instrument that involves a pipe. Traditionally, sound wave instruments utilize an open tube, but I’m interested in exploring what happens when I apply a force F to the pipe. How can I theoretically model the relationship...

For this problem, I took the moment about point B to 'get rid' of the tension force in the cables BA and BC. By doing this, I figured I could solve for the x and y components of the reaction force at D. From there, I could solve for the tension in BA and BC in the x and y and then solve for Dz...

Consider a test setup as shown in Image below, where I have a blue object sandwiched between a material inside the container (for eg. sand) and a surface. The container is fixed and the material inside is assumed to not move. Using a force guage, I can measure the peak amount of force...

I tried 2 ways to solve it but both yielded different answers. i would like to know which is correct and why the other is wrong. thank you. method 1: consider force of each tyre. 5 x 10 = F = 50N. so 4 tyres = 200N = weight method 2: consider the whole car, total pressure = 4x5 = 20. total...

In physics, velocity (speed) is the "change of position (spacial location) per change of time" and acceleration is the "change of velocity per change of time". Mathematically this is first and second derivative. Do further derivatives exist that correspont physical quantities like "change of...

If I solve a problem of a box sliding down a slope or standing still on the slope, the force of friction is directed up along the slope. What happens if there is a force F pulling the box up along the slope, but it's unknown if it overcomes gravity and box is moving up or it only slows the box...

Dear all I am trying to find the support reactions on the following structure: The frame member in the horizontal is 8m long and in the vertical the member is 5m. To do this I am using the force method (or unit load method or virtual work method). Firstly, I removing the redundants at the...

When I do a press-up I consciously push down on the ground, my muscles tense, I breathe harder, I sweat, etc. When the Earth pushes back up on me (Newton's 3rd Law) is it 'doing anything', or does it push back up on me merely by virtue of it being there?

I found this equation as a solution to the original problem of a point-like ball rolling without friction in a parabolic cavity from Lagrangian mechanics: Is it possible to add an extra force to this equation? I want to add a "magnet" at a certain position that will affect the ball. The...

I believe it is not only about weight because you still push into the ground while you run, so it's gotta be more than that. I thought it could be calculated by a simple electronic scale experiment like you will push on them with your foot and collect the reading, however, it seems to be more...

I could understand the problem perfectly; however, I do not know how to construct the problem. The problem states that two forces are acting simultaneously on the object, but how could I represent that fact mathematically? I really want to solve it, but I am facing this roadblock, so please...

a) ##P=\frac{F}{A}=\frac{\frac{1500\times 9.8}{4}}{180\times 10^{-4}}=2.04 \times 10^{5} Pa## b) Is the pressure in (a) gauge pressure? My answer for (b) is 2.04 x 10 5 + Po where Po is atmospheric pressure c) (i) it will increase since the size of the tire also increases (ii) I am not sure...

For P, the force will be 2F and the spring constant will be ##\frac{k}{2}## so the extension will be 4 times, and the energy will be 8E but there are no options showing 8E What is my mistake? Thanks

Hello, I am trying to get my head around this, maybe someone here can help. I have a force arrow diagram for gravitational forces of both Sun and the Earth. Can someone help me name these forces please. Am I correct in thinking that force 1 is the gravitational force that the Earth exerts on...

For electric charges the relation is ##F=k\frac{q_1q_2}{r^2}##, where ##k=\frac{1}{4\pi\varepsilon_0}##. It seems to me that for the (hypothesized) magnetic monopole one could write an equivalent ##F=n\frac{p_1p_2}{r^2}##. I have replaced the q's with p's for "pole strength", and k with n --...

I first attempted to solve the problem by ##A_{ext} = \Delta E_{mech} = F_{ext}s##. Here, ##F_{ext} = F_{friction}## and ##\Delta E_{mech} = E_{k2} + E_{p2} - E_{k1}##. We obtain then the following equation: $$F_{friction} = (m((v_2)^2 - (v_1)^2))/2h + mg,$$where ##v_1## is the velocity at time...

Somebody, please explain to me about the Lorentz force between two parallel current-carrying wires in terms of the momentum conservation as the electromagnetic fields has momentum density. Especially, (1), If a short rectangular magnetic pulse due to an electric pulse in one wire will still...

Currently debating with friends how far varying weighed objects could be punted and the distance we could kick them. Instead of grabbing dumbbells I'd rather use math. Was looking for an equation to use and have been having trouble. I know the average adult can kick with a force of 1000lbs...

I don't really get why applying different forces to objects of different masses would result in different accelerations. I read my textbook, and I understand the formula F(net) = m*a, and I think the reason may be because mass is inversely proportional to acceleration ? But this doesn't really...

I am curious to know if there is any existing topic explaining how objects break into several pieces when force is applied.

Hi all! I hope I'm posting in the correct section! I’m trying to work out the force required to stretch resistance training bands for two particular set ups shown in the pictures. I’m not a physics student or anything like that (I'm many years out of school!), however I am pretty good at maths...

Hello, Why is it more difficult to break a shorter bone that is cut into a cylinder than a longer cylindrical bone by pressing the bone vertically from its top despite sharing the same cross-sectional area?

In the following diagram (from Taylor's Classical Mechanics), an inertial balance is shown. Intuitively, I totally understand that unequal masses would cause unequal accelerations and therefore rotational motion of the rod. However, how does one prove this mathematically? The first thing...

I dont need anyone to do the sum directly please. I just need some hints, please dont give me the solution. Im unable to understand how the bob will hit a maximum elongation, there are two forces accelerating the bob: Gravitational force and electrostatic force. There is one force...

A few months ago, our teacher gave us a problem regarding cylinder motion. He asked us to calculate the acceleration of a cylinder that's acted upon by a force F at an angle theta due to the x axis. Now, for some reason, he told us that the cylinder would rotate. Now, I'm not sure if he supposed...

I'll try and keep this as easy as I can. The Right Triangle above represents the forces acting through the trailing shoe of a automotive drum brake. Point A is the central position of the brake expander. When the foot brake is depressed, a force is created that pushes the brake expander piston...

Reference textbook “The Physics of Waves” in MIT website: https://ocw.mit.edu/courses/8-03sc-...es-fall-2016/resources/mit8_03scf16_textbook/ Chapter 2 - Section 2.3.1 [Page 45] (see attached file) Question: In the content, it states that we need to use real force and real displacement...

Hi, This is not a homework problem, but a small personal project where I am looking to create a small solenoid that can create enough pushing force of approximately 0.5 lbs. I am wondering what the best route is to create this amount of force. So far, I was able to lift about 32g with my...

Definition: Moments is a measure of turning effect of a force upon a pivot. My questions: What does it mean if it is a measure of moments? Does it mean the angle of turn? Does it mean the speed of the movement? Does it mean the distance travelled? Let's take a door as an reference.

What are the factors considered while calculating clamping force requirement ? Clamping force for welding based on thickness - 48*s^3 s- thickness what are other factors considered along with thickness and i need a detail source/reference books?

Hello. I work for a company and I need your help! The pipe is welded to the wall. However, the worker applied force to the right with the force of F, and the welding was cracked. As a countermeasure, welding is carried out in two layers as shown in the picture on the right. In this case, is it...

Hi. I need your help! I have a college physics question Suppose there are pipes A and B. [Figure 1] I had to connect pipe B to pipe A, but pipe B was short, so I bent A by about 30 degrees and installed it. [Figure 2] It's a picture of the pipe A being installed by increasing the length in...

This is the question: What is electromotive force? What's its relationship to Voltage? + clarification of confusion If you believe you have a good answer, please answer either in this website or in Stack Exchange.

My question is on the highlighted part in red. For the first part i have, ##F_{parallel} = 900 \cos 82^0 = 125.3N## For the second part, i have ##F= \dfrac{125.3}{\cos 15^0} = 129.7 N ≈130N##

Since ##x## is larger than the linear dimensions of the cylinder, hence it can be approximated to be a point dipole . $$\vec{F}=\left(\vec{\nabla}\cdot \vec{p}\right)\vec{E}$$ In our case : $$\vec{F}=p_x\frac{\partial E_x}{\partial x}$$ $$F=\frac{-2kQp_x}{x^3}$$ Of course , we can assume some...

I am able to understand the textbook solution, except for its very first assumption: We use the coordinate system shown in the figure, and find the shape ofthe spring (assumed to have already attained its stable configuration) in this frame. Why is it fair to assume that the slinky will ever...

TL;DR Summary: how to calculate the force exerted by the "tendon" and the resistance occurring on the "tibia" if a 70kg man leans on his tip of the foot. Hello, This is the question: "A 70 kg person stands on the tip of the foot. Assuming a configuration as in Figure 5.6 calculate a) the force...

An alternative title could have been "how do forces propagate" but google searches bring up things related to waves only. Initially my problems started with a mass on a spring but I was able to boil it down to any general system comprising at least two 'parts' in succession. Suppose you have...

As far as I know, there are two causes of the rotational motion of the charged ring. T he first torque is from Lorentz force: $$T=Q\mathbf{R\times ( v} \times \mathbf{B}_{r}) =-\frac{QR^{2}}{2}\frac{dz}{dt}\frac{d\mathbf{B}_{z}}{dz}$$ (where ##\mathbf{B}_{r}...

I have some questions... Firstly I drew the FBD of the said block at an angle theta from the vertical Which force causes the block to lose contact.ie the normal to become zero... Is it because the forces in the horizontal direction surpass some limit value of the net force in the radial...