Accelerate Definition and 200 Threads

I was perusing superglue accelerants like bi carb and graphic or a mix of the two, and other additives, and it appears that a mix of bi carb and graphite works the best. However I eventually came across a single vid that used iron oxide made from burning steel wool, as the additive and it...

For part (b), The solution is, However, if the acceleration was not constant during the 21 ms, then would the power required be larger? I believe the average power required would be larger because if the train started off at a lower speed and then speed up very rapidly towards the end...

I'm a little confused because my teacher used Bill's 500J of work for the kinetic energy equation and I don't understand why. I used the net work, so 300J, to find the speed and I'm not sure why that's wrong. Wouldn't friction make the wagon move slower than if there was no friction? So why...

How is it possible that friction makes car turn? From what I know, frictional force is acting along to the direction of the wheel turns. When the car turns, the direction of the frictional force now act opposite to the direction of the wheel turns! I'm sure if you rotate the steering wheel to...

I would like to invite your members to participate in the ZPrize competition. ZPrize is an industry-wide competition, modeled after the XPrize, to accelerate zero-knowledge cryptography. We have over 39 leading zero-knowledge technology companies contributing to this effort donating $7 million...

( This question came up in the context of flat earth. Sorry for that, but hopefully the question itself is not dumbtarded. ) Basically one "model" for gravity that some FErs subscribe to, is that the Earth disc is accelerating upwards at 9.8 ms-2. And one debunk of this proposition was that the...

[Mentor Note -- Thread moved from the New Member Introductions forum] How did you find PF?: google search I am a middle school student and have a deep passion for physics, I want to understand quantum mechanics and relativity. Physics according to me is the most precise description of nature...

An elevator of mass M is accelerating downward with constant acceleration A. Friction force acting on the elevator is constant and given by f (The initial speed of the elevator is zero.). Find the power generated by the engine of the elevator (in terms of M, A, g, f, and time t). For this...

Hello all. I am trying to understand the math behind this and keep getting stuck. If I want to accelerate and object downward,lets say 16 inches in 0.1655 seconds , that would be faster acceleration than gravity. I think 29.67 m/s2, so if I calculate force to accelerate at that rate downward...

Disclaimer: I'm not actually sure which acceleration is proper and which is coordinate, and I can't recall the source for the half-remembered equation. I spent some time going through my bookmarks, but it was to no avail. Sorry about that. So, general relativity removes the idea of gravity as...

I wanted to ask this question for very long . lets say we have rocket in mass of 1kg in space that moving in speed of 100 m/s if we want the rocket to speed up, we need to spent some energy that equal to mv^2/2. in our case it 1*200^2/2 it 2000 Minos the energy we already have which is...

So I am working on a project where I am attempting to accelerate an object upward Against Gravity but I am having trouble figuring out the math behind the force needed to do this here is what I have come up with so far,my apologies I am not very good with math I found this equation W=m(a+g)y...

Clearly, in the picture I can see that on the small block on top, tension and gravitational force act. Gravity gets balance by the normal force, so tension is the only force causing acceleration. On the block at the side gravity and tension result in vertical acceleration. However, I do not...

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...

(a) When the cab is carrying its maximum capacity, at what rate must the motor deliver energy to get the cab up to cruising speed? My shot was finding the acceleration, a=1.5/2 = 0.75m/s2 Displacement of elevator Vf2 = vi2 + 2aΔx Δx = 1.5m Force of elevator (Since it accelerates...

Terminal Velocity is reached by a falling object when wind resistance is equal to the pull of gravity. What this means is that the object stops accelerating...as in a sky diver: he jumps out and falls and accelerates at a constant speed, which would 9.8 m/s(due to the pull of gravity). but...

This problem has been confusing me for quite some time:Two astronauts, initially at rest in free space, pull on either end of a rope. Astronaut A can pull the rope with a force Fa, which is greater than Fb, the force that Astronaut B can pull with. Their masses are Ma and Mb respectively. The...

There are 2 blocks, 1 on top of the other. The top block has a mass of 3kg, and the bottom block a mass of 5 kg. The coefficient of static friction between the 2 block is 0.2. The floor that the bottom block is resting on is frictionless. What is the maximum force that you can apply on the...

Here's a question from Physics by Giancoli 2nd Edition, published back in 1985, nearly 4 years before my birth!!!!quote:A merry go round has a mass of 1560kg and a radius of gyration of 18.5m. How much work is required to accelerate it from rest to a rotation rate of one revolution in...

If nothing can be acclerated to light speed, then how are photons emitted?"Everything but the opinion page. I don't need to be told what to think.....by anyone living." - Ned Flanders from The Simpsons

If you wanted to accelerate a 14kg lawn spearder from rest to 1.5m/s in 2s, what force (in N) would you need to apply to the handle that makes a 45 degree angle with the horizontal.

matter and anti matter both are bound by the laws of physics not to exceed the speed of light.both have opposite properties but still do the same thing.matter does it by taking on energy by forcing it into motion.this energy is'nt lost.as matter reaches the speed of light the energy of motion...

Need some mathematics and web sites on how to accelerate ions. I know you can use magnets and electrostatic plates to propell an ion but I need to know how quickly the electrostatic or magnetic field can accelerate an ion with an atomic number (z) before the field rips past the ion and the ion...

Hello, I am trying to learn Quantum mechanics and have some questions I cannot answer. cooper pairs, composite boson particles (spin number = 0 or 1) from two coupled electrons. The movement of cooper pairs is forming a superconducting current. Superconducting current does not have a...

Summary: Can a particle accelerator accelerate gaseous fuel? Does space-time differ for detonating ionized fuel moving near the speed of light within a magnetic field such as a particle accelerator?

Do electrons have motion or they just accelerate when they get enough energy?

I'm struggling to understand something basic here. If I have a just a wheel, with mass 10kg, and radius 0.25m, and I specify that the CG is accelerating linearly at 1ms-2, how do I calculate the force needed to do this? Using F = ma gives 10N, but using this value for torque calculation on the...

Problem Statement: would you need a force to accelerate an object on a friction-less surface? How could one calculate the force? Relevant Equations: F=MA would you need a force to accelerate an object on a friction-less surface? How could one calculate the force?

So above is the question. The picture below is my attempt at the solution: However the answer at the back of the book suggest that T=1.929s

im confused about this thing, because they said Earth's acceleration due to gravity is independent from the mass of the thing dropped

Hello, I have a problem to understand acceleration in GR, objects in free fall move along a geodesic, they are in inertial motion. But observer on Earth can clearly see that falling thing accelerates. What causes the acceleration, when there is no gravititional force? Thanks for answers.

Please clarify. I have read that according to NASA the universe's expansion rate is 74.3 km/s +/- 2.1 at Mega parsec. At a distance of one Mega parsec, space is moving 74 km/s away from us. At 2 Mega parsec it is moving away at 148 km/s. Do I understand this correctly? But this is velocity, it...

Homework Statement I'm simulating a warehouse (in Unity) where forklifts and other vehicles transport stuff from point A to point B. The routes are modeled as a graph with vertices and edges. Every transport is saved as a task in a backend system with the relevant data such as starting time...

What is the physical property that gravity has that enables it to make an object go faster or, if it is resting on the ground, have weight? In General Relativity (as I understand it) objects in free fall move in geodesics. Thus an orbiting satellite moves in the curve around the planet that is...

What is the physical property that gravity has that enables it to make an object go faster or, if it is resting on the ground, have weight? That means it can do work: it gives objects kinetic energy. Where does that ability come from and where does the energy (the gravitational potential...

I've done the math but because i can't find this answer anywhere in the book which I'm reading and on the web, I would like to be sure if my calculations are correct. I know that if two objects (starting at the same time) are free falling without a drag force being applied to them, the...

The basic concept is to have your space probe(s) - likely nanocraft [1] on a spinning object in space which allows you to preserve the momentum you give it while accelerating it faster. Then once you are at a speed you can simply release the nanocraft in the direction you want it to go in. More...

Homework Statement Object of fifty kg and a r= 0.025m. What's the torque to accelerate from 0 to 0.4 in 20s. Homework Equations Torque = Moment of inertia * angular acceleration T = I * α The Attempt at a Solution [/B] m = 50kg r = 0.25m α = (0.4) / 20 = 0.02 I = mr^2 = 50 * 0.25^2 =...

Hello, Special arrangements of charged material can be used to accelerate charged objects or particles, e.g. a cathode ray tube. I am just wondering if it would be somehow possible, in principle if not in practice, to accelerate objects with gravitational force using special arrangements of...

Hi. The energy required to accelerate an object of mass ##m## to a speed ##v## is ##E_k=\frac{m}{2} v^2##. But how much energy does an object need to accelerate itself to ##v##? Say, how much fuel (in energy units) does a car need to accelerate to ##v##, if there are no air resistance or...

Homework Statement Hi, guys. I'm in a bit of a quandary. I'm trying to calculate the power a motor should have in order to move a mass a certain distance. My calculation keeps telling me that the horsepower output is much lower than my reference scenario. Here's the situation. I'm trying to...

Hi everyone. Just a small, quick question I have: Can negative ions be accelerated by a Van de Graaff particle accelerator? My initial reaction is no, because the terminal (the sphere with the charges allocated on the outside) is positive, which means negative ions would be attracted and not...

Let's say we have a 1kg object and the reference point is the ground. Accelerating it from 0 to 1 m/s takes 0.5*1*1^2 - 0 joules, which is 0.5 joules. But accelerating it from 10 to 11 m/s takes 0.5*1*11^2 - 0.5*1*10^2 joules, which is 10.5 joules. This doesn't make much sense to me as the...

I know that light is always at constant speed but does it ever accelerate when changing direction, if you put light through lots of different densities it curves into the Brachistochrone curve, would that be an instance of light acceleration.

So in GR, objects orbiting the sun, for example, move in a geodesic - a straight line something curved. Without GR (using Newtonian Gravity), I can easily say because planets orbiting the sun are doing so in a ellipse, they are accelerating. However, would they still be accelerating when you add...

Hi, I've been asked to solve below as part of an assignment. Below is pretty much what I've submitted but it has been concluded to be incorrect. I am unsure as to why hence the question. Is it due to the fact that I have not taken the mass or forces into consideration? I have only taken these...

Homework Statement A solid disk of diameter equal to 500 mm and a mass of 60 kg is to be used as a flywheel in an energy recovery device. Determine the torque required to accelerate the rotation of the flywheel, about its axis, from rest to 250 rpm in 6 revolutions. Homework Equations [/B]...

Lets suppose we have a charge and we want to accelerate it from a point A to B and back. Does the energy requirement increases if we move the charge quicker? I can make an analogy with mass. To accelerate an object over a distance d requires energy. The objects resist to change in velocity. The...

Homework Statement How much energy does it take to accelerate an object of mass 20,000 kg from rest to 0.9965c? m = 20,000 kg v0 = 0 m/s vf = 0.9965c Homework Equations ## E^{2} = \sqrt{(pc)^{2}+(mc^{2})^2} \\ E_{KE} = (\gamma - 1)mc^{2} \\ \gamma = \sqrt{\frac{1}{1-(v/c)^{2}}} \\ p = \gamma...

<Moved from a technical forum. Therefore no template.>I am currently analysing the forces acting on a moving vehicle. The vehicle is mounted on a rail with wheels on both upper and lower side of the rail with a spring increasing the reaction force, and thereby the friction. The vehicle should be...