Force Definition and 1000 Threads

First, start off with x and y directional forces F (Test object 1) - F x(Test object 2) I need help primarily with finding the horizontal component of the force from object 2. How do I find it and express it? Thanks

According to general relativity, gravity is not a force, however it is referred as one of the four fundamental forces. This seems like a contradiction.

I tried solving this by assuming the acceleration of the truck and block to be the same so the block would stay on the incline. Also, I would assume truck ma = static friction, block ma = mgsintheta... then I solved for a to plug into 1st equation to get 12990 N. Is this correct? I wasn't sure...

Like AT asked I post a new thread because it is a different example, here there is no friction and I use a needle and an elastic to have the forces. The circle moves in horizontal translation, the circle doesn't rotate around itself, the red wall rotates around A0, and A0 is fixed to the...

A bending moment about an axis passing through a cross section arises due to an uneven distribution of stress across the cross section, like so: I have read that any given bending moment is equivalent to a force couple applied about that axis. That is to say that the curly moment arrow on a...

Hi! I need help with this problem. m1-2-3-4 and R are given. There is no slip in the system. I have to give F1-2-3-4 in respect of the masses and R. Here is what I managed to m1 is easy: m1*a = m1*g - T(tension of the rope) m2: m2*a = T - (?) <-- I have a problem with this. F1 and F3 is the...

My guess is that the force per volume is: $$ \vec F_V = \rho \alpha x \hat x + \vec J \times \beta x \hat y$$ but I'm not sure where to go after that. I'm not given a value for either the charge density or the current density, so I can't simplify the relation much. Further, I'm not sure if my...

Thought of doing this one years ago! Basically, I want to 'see' the magnetic force lines that surround a conductor when energized (with an alternating current). I appreciate that what I will see (or at least I am hoping to see) is the pattern formed by the iron dust in response the the field...

At first, I thought when the rod goes really far away from the particle, then L would approach to zero in a particle's reference view. As a result, the equation will be GmM/d^2. However, I just thought that L just remain as it is regardless of change in d, but not sure...

Hello, I have designed a gearbox that bolts on to a fixed engine and fixed pump. It is completely supported by them. The total mass of the gearbox and the components attaching it to the engine and pump is 7.7kg. Its centre of mass is 0.167m along the x-axis and 0.09m along the z-axis from the...

Dear, Could you tell me if the calculations on the attachment are correct? I need to determine the force necessary to prevent the clamp from slipping. Basically the clamp is a part of rubber that I can press against the pipe wall. A load will be attached to this part of rubber. The tube is...

Situation: Let’s say we have a wire bent into a circular shape, there lies a bead through the wire and it can slide through it. The wire is kept in vertical plane and is swung along the axis AB. My question : How the centripetal force is provided to the bead? The bead will go into a...

Hi, I previously posted about the statically indeterminate truck problem. Thank you to everyone who helped me. However, I now realized that isn't the problem I need to solve. I need to know the force of the linear actuators to lift the rear tyres off the ground. Since the tyres will be...

Please help. Thank you.

I found the correct solution using the equation that relates force and pressure, but I don't REALLY understand what the question is asking and what is actually going on in the machine. I want a better understanding of everything that's going on, not just an answer. Below is a clear diagram and a...

Suppose we have a system of particles being acted upon by a single external force ##\mathbf{F}^{e}##. Each individual particle feels a force of ##\mathbf{f}_i = \mathbf{f}_{i}^{int} + \mathbf{f}_{i}^{e}## such that ##\sum_i \mathbf{f}_{i}^{e} = \mathbf{F}^{e}##, and ##\mathbf{f}_{i}^{int}## are...

I can say that the frictional force always against the rolling sphere and the velocity is increasing for the ball. So The dot product F.v keeps on getting more and more negative, so how can the Pf remain constant? Well the velocity increases along the incline and the force of gravity is down...

Help me find the friction force when slipping/falling I already posted this question, but I needed to reword it and include more info. A 158 lb man runs on a horizontal wet surface at 3 mph before decelerating to 1.5 mph about 4 feet before a right turn. There are cement stairs at the turn...

Block A is accelerating at a= 49.6/0.5 m/s (99.2m/s) Block B force is F= 3kg * 99.2 = 297.6N but I'm not sure where to go from here?

We have a rod ##AB## of mass ##m##, a force (perpendicular to AB) is applied at ##A##. I want to know how much force will ##B## going to feel? When ##F_1## is applied at ##A## rod will rotate about its COM (which lies at the Center) and hence the point ##B## will also move (a little downwards...

If I have a motor that is turning a shaft with only a small torque required but the shaft is also being forced into the motor, axially at a large force, what is the effect on the motor here? If Faxial is large, does this effect T and how does this effect the motor?

Hi, Please have a look on the attachment. The displacement of swing from the equilibrium position, x=0, is considered to be maximum, +x, when the swing reaches the person who is pushing it. The pushing force is of short duration and could be approximated by a pulse. I hope I have it correct...

p man= mv p man = 90 (7) p man= 630 p sled= mv p sled= 100 (0) p sled= 0 p man+sled= 630 + 0 p man+sled= 630 fg man= mg fg man= 90 (9.8) fg man= 882 fg sled= mg fg sled= 100 (9.8) fg sled= 980 fg sled+man= 980+882 fg sled+man= 1862

I am conducting tensile test on a bigger scale. When the material breaks i have the maximum kilograms that can be a applied to the material. I pull horizontal in a rubber patches glued to a rubber sheet and i want to find the maximum tensile strength in the glue. How do i convert my 2000 kg pull...

This is my homework. And we don't have online lessons. But my teacher gave this for homework. I couldn't solve this problem. Can you help me?

Hi all, not exactly a physicist however I am finding that the expertise of those in this field, would be massively appreciated in the field I am currently delving into - exercise science. Specifically an understanding of engineering physics. As described above, in short I am trying to work out...

In my textbook, the effective force of a particle on a rotating frame is given as below: The diagram is: What I do not understand is the expression for Rf dotdot, which is given as below: According to the book, an arbitary vector Q can be expressed as: So Rdotdot w.r.t fixed frame can be...

hello there, I am wondering if my attempt at a solution for this particular problem correct?? I mean I know that the blocks won't move and the total friction force is 38.95N (at least lesser than that, since that is the maximum static friction). I saw someone attempted the solution but it is...

I'm often got confused about why the direction of pseudo force is taken opposite to the direction of motion of the body. As specific, I have this question. In this, I didn't understood about why the direction of pseudo force is taken in right, in the diagram of solution provided to this...

1. When a car turns there is a centripetal force towards the centre. This centripetal force is labelled as a static frictional force. I don't understand where this static frictional force arises from. Friction is meant to oppose motion, but I don't see the motion that is parallel to the friction...

adding all the torques around the red circle position (taking clockside direction as positive ): -M*g*L*sin(theta)-k*x*y=I *w (considering that the suspension bar is of negligible mass as the problem indicates )here "x" is the normal "x" of hooke's law (I don't know exactly what it is for a...

Lets say you have a completely rigid blue-colored object shaped as shown below. The object had one wide protrusion on one side and four smaller protrusions on the other side. Everything is completely symmetric so that the weight would be evenly distributed. Let's say you press with 12 N of force...

Exercise like this: I think that the friction force can assume two direction, up and down, but how can i know the direction of the force? I want to say, i don't even know which mass is greater to say i the block will upward or downward. that is the doubt. That is the correct forces directions...

This is a fairly straightforward problem. I'll just post the way that I'd solved it: for some reason I'm getting the wrong answer. $$m\times a_{0} = F - w$$ $$a_{0} = \frac{F}{m} - g$$ $$v_{0} = (\frac{F}{m} - g) \times t$$ $$y_{0} = (\frac{F}{m} - g) \times \frac{t^{2}}{2}$$ This gives us the...

Hi,I couldn't do this problem.I hope someone could help meths is my first time in this forum

In a salt crystal, the distance between adjacent sodium and chloride ions is 2.82×10^−10m. What is the force of attraction between the two singly charged ions?

Suppose we define our system to contain a few deformable bodies that exert gravitational forces on each other, and are consequently moving towards each other in some vague sense. We might want to express the total energy of the system as the sum of the mechanical energy and internal energy...

U=-∫F*v*dt= -∫(m*g/3)*cos(ω*t) dt = -(m*g/3 )* (v/ω )* sin(ω*t) except that according to the official solution, I should be getting positive sign instead of negative. Am I doing something wrong?

I am using the Stanford “Dynamics: Inverted pendulum on a cart” document, https://web.stanford.edu/class/me161/documents/InvertedPendulumOnCartSolution.pdf, as the basis for the Arduino c code. I need help with the term Fc (Feedback force on the cart A) because the motor I’m using is a stepper...

With the above in mind, I have a cable of E=60GPa, cross sectional area 7e-4m^2. I want to understand the relationship between the tension applied resisting the deflection of the cable when a force is applied so that the cable will not deflect more than 0.7m in this case. Take the force as...

Given: q = 1.6*10^-19 C B = 0.3 T north v = 3*10^6 m/s north-west θ = 37 (degrees) Solution Attempt: a) F = Bqvsinθ = (0.3)(1.6*10^-19)(3*10^6)(sin(37)) = 8.7*10^-14 N b) Via right hand rule, F is into the page c) a = F/m = 8.7*10^-14/1.6 × 10^−27 = 5.4*10^13 m/s^2 When I checked my answers...

Let's say that on the surface of the cladding we have evanescent field due to the total internal reflection between the core and the cladding. The refractive indices of the the core is 1.45 and the refractive index of the cladding is 1.4, and I want to use the gradient force of the evanescent...

if i pick up a bucket i apply torque to the bucket. my shoulder is the fulcrum. is my elbow the point of application of force? just trying to understand the physics?

The definition of rigid body says it cannot be deformed (theoretically). Now, Newton’s third law is caused (I mean the reaction force is caused ) due to the deformation of the body. What I have learned is that every body is like a spring, when we push on it we compress it and hence feel a...

My initial attempt: Total Centripetal force on the cylinder would be given by $$\textbf{F}_{net} = mR\omega^2 \textbf{e}_1+mr_{cm}\omega^2 \textbf{e}_2$$ where the vectors e_1 and e_2 have magnitude 1 and point radially outwards (and continuously changing as the cylinder rolls down) as marked in...

Hello all. Right now I am taking physics 1 and were doing the Work-Kinetic Energy Chapter. I was just reading the derivation for the work done by a spring's force. I understand how to get the result but what i don't understand what to make of it. I understand that because a spring's force...

So I was wondering how I calculate the magnetic force between two magnets. When we learned about magnets, we only covered magnetic fields and electricity (laplace's law) and how electricity can create a B-Field. But how will two B-fields (or magnets) affect each other? Is there a simple formula...

I am designing a machine at the moment, and I am struggling to get my head around impact forces. I have established that the force applied is mgh/d, but I am struggling to work out the value for d. Taking it in isolation, assuming that the falling weight does not "give" in any significant way...

I have a question about the following 33 and 34. For number 33 I think the answer is B because you have to life up against the force of gravity. While with A you have gravity helping you out. The correct answer is A but I am not sure how. for 34 I think B because you have an extra pulley so...