Impact Definition and 956 Threads

Milwaukee makes a cordless right angle impact wrench, 2565-20. As part of their M12 line of power tools. A YouTube channel tested the performance of the tool, with their different batteries. I'm having difficulty in understanding the observations. It seems that higher output current batteries do...

TL;DR Summary: I'm trying to figure out why this answer is not correct for a mechanical impact: "Conservation of energy and conservation of momentum can be used to find the relative velocities after the impact" Hi! I have a multiple choice test that asks...

They always talk in boxing and martial arts to stiffen at the moment of impact, but how crucial is this? By way of analogy, how much of a power leakage results from a hammer shaking at point of impact compared to a stiff one? Less concentrated force, surely.

Asteroid 2024 BX1 that exploded over Berlin was fastest-spinning space rock ever recorded https://www.livescience.com/space/asteroids/asteroid-that-exploded-over-berlin-was-fastest-spinning-space-rock-ever-recorded Visualisation of the trajectory and impact of asteroid 2024 BX1 on 21 January...

I am struggling to find correct approximation for the problem. Is momentum conserved at the immediate impact of... (1) Can I ignore gravitational force and potential for the spring which is connected to ground and vertically upholding a mass . ( using equilibrium)

I do not know much about this, please help. My truck seat back cushion is 2" thick. Truck A is ~5,700 lbs from google. 2011 f-150 super cab 6.5ft bed. Truck B is ~5775. 2015 GMC Yukon xl slt. If truck A is stopped and braked and truck B hits truck A going 45-55mph creating a force of...

I have heard that an asteroid the size of the Rose Bowl has a slight chance of impacting Earth. Experts say you should not "blow it up" because then we would have many smaller impactors with random trajectories rather than one big one that we could pinpoint with accuracy. But, Wouldn't many of...

I'm designing a cart holding a 3,000 lbs load that will be pushed around the shop floor. One structural load I am concerned about is if the operator pushes the cart into a rigid stop, how much load will that impart to the cart? I realize calculating the g-load is a very complicated problem...

I'm curious about impact on falling object, so i have taken initiative to solve this problem. I considered only force on the falling object would be its weight and taken F=mg. With only limited data m=.25kg and drop height h=1m. Pondering on this consideration practically, it will have more...

Sorry for this beginner's question, but...if F=ma, then force is all about acceleration. But if vehicle A moving at constant velocity V hits a wall, and vehicle B moving at constant velocity greater than V hits the wall, then B hits the wall with greater momentum than A and does greater damage...

Top-Down-Perspective: At first I am quite sure that the problem is not solvable since there are that many unknowns. But my Approach would be to create a linear function with P1 and P2 and then set it equal to the function that gets me the impact location of P3 and then solve it by b3. Thanks...

1.Does the Maxwell Boltzmann distribution change depending on the shape of the container? Pressure and the volume is constant. How is the Distribution affected whether the gas is in: a,sphere b,cube c,cuboid? Why does/doesn’t the distribution change depending on the shape of the container...

I usually think of a sphere as the set of all points ##P_x##, that have the identical distance r to some point ##C## which is the center of the sphere. I calculate the surface area ##A## of the sphere as $$A=4 \pi (C P_x)^2$$ However, what happens if I think of the distance between the points C...

Hello, I hope this is the right area to post this question. We are having a debate at my workplace and was hoping there was someone more qualified to settle the debate. We are a packaging company and have setup an experiment to test the pressure differnential from sealiong at 1800m vs. Sea...

I just launched a 2.2kg model rocket that stands about 5 feet tall and has a airframe that is 4 inches in diameter. I am trying to find how much the impact force is when the rocket hits the ground at 16MPH. Whats the best approach? Momentum? KE? or something else:) thanks

It looks to me like no more than a huge ego trip for rich people. How much of the money spent will contribute to our knowledge of Science or Space. One image from JWST probably has more worth than the whole of this fun project. They might just as well send their money to Yemen, Ukraine or Haiti...

Since the radius is "very far", I cannot find the total mechanical energy by using the gravitational potential energy formula and find the kinetic energy at impact. I can't think of any other way to find final velocity without knowing the radius.

My school's group project is to design a powered model flying wing that can fly for as long as possible. To make it stable in the longitudinal direction, we either have to use a swept wing design or an airfoil with reflex (like BR1). We are forced to use wing sweep because the airfoil with...

Hello, I have some trouble understanding the role of the sympathetic nervous system in vasoconstriction and vasodilatation of blood vessels, I searched and found contradicting resources, does anyone have the right answer?

Suppose you have a jet of fluid (say water) traveling vertically upward at a constant velocity. It impacts a stationary horizontal plate and so moves radially outward in all directions. Assume that there's no energy loss during the impact, so the speed of the fluid remains constant. Is momentum...

Pictures have appeared showing the asteroid Dimorphos following its impact with a spacecraft and showing a trail being left behind. On further consideration, this is taking place in a vacuum, so there is no air resistance. Why is the debris forming a trail behind the asteroid?

Astronomers with the ATLAS project also chronicled the event. Short for Asteroid Terrestrial-impact Last Alert System, ATLAS is an asteroid impact early warning system based in Hawaii and funded by NASA. “ATLAS observations of the DART spacecraft at Didymos” exclaimed ATLAS in a tweet. A...

Last post with picture, after this i will use Latex. She say that correct answer is 41 ft/m. Is this correct?

I am studying the force that helmets have to withstand. If I drop a 5kg head model and helmet at 1.064m on an anvil and the impact time is 0.005 seconds, how do I get the 'maximum' impact load on the helmet?

I have 3d printed some 25mm cubes all with the same parameters. what i want to do is take some different weight dumbells, and drop them all from half a meter onto a cube. My goal is to collect data and see at what impact force the cube fails. For me, failure will be when layers break apart, not...

I am looking for a good working fluid whose boiling point is in the range of 150-180 F for a waste heat recovery system. The fluid should be minimally flammable, preferably nontoxic, and low in environmental impact. Does anyone know of any working fluids that match this description?

I'm struggling with trying to find how conceptually need demand and capacity to be conciliated during impact. In particular, I find two different formulas in papers and websites dealing with impact. In all cases, they state that there are two forces acting on objects on impact, where they...

Suppose two objects, A and B, with large lengths LA and LB, and masses MA and MB, collide at time t0. Both objects before collision are vertical and aligned concentrically, being object B positioned initially at a higher z coordinate than object A. The bottom end of object A is rigidly...

Hello , I was looking into current density analysis of a PCB that handles distribution of AC power . from ansys and cadence sites , i realized by current density they refer to DC IR drop that is a pure ohmic analysis that doesn't take into consideration the AC effects . And in order to take this...

Huge asteroid slammed into Greenland just a few (~7-8) million years after the dinosaurs died out https://www.space.com/greenland-impact-crater-hiawatha-age Scientists from Swedish Museum of Natural History independently sampled rocks from the crater and dated them using the uranium...

The reading that I have says that centrifugal force (center fleeing) does not exist

Hey guys, I have object i know its mass and velocity so i have energy. I need some king of classification of what impact it will make if it hits earth.

(This is a history of science question, so please let me know if it's not appropriate to this forum.) When did someone first realize that major Earth impact events (asteroids, etc.) could potentially be catastrophic? To be clear, I don't mean in the purely theoretical sense (the likely given...

Do we really "think" our thoughts or are they just influenced by our experiences with no actual control given to us; or if we do take our own decisions then is the process similar to how computers return true/false values (if, else, else if, etc.)?

I haven't played many video games beyond the early Pong games in undergrad and some Flight Simulators after I graduated. But my kids and grandkids are definitely part of the video game generation, and after watching some of those games and some advertisements today on TV that had the players...

Firstly I would like to start with solving the problem with energy conservation principle which most solutions to the question show. -Gmm/r= 1/2 mv^2 +1/2mv^2 -Gmm/2R Where m= mass of planet r= initial seperation v= final velocity. R=...

A car service center used a hydraulic impact torque (is this the one used?) on the car tire nuts. See video. The car tire nut are rated at 88 ft lbs torque. What is the estimated torque in the hydraulic impact torque? Could it be double or more? I know he should have used a torque wrench but...

Hello, so recently I have been doing one preetty simple project in FEA, my task was to do a front impact analysis on go-kart chasis. While the simulation itself isn't hard at all and to be honest I had easy job thanks to various sources of tutorials around the web, I feel like I don't understand...

Please see attached image. This was a lab performed where a puck hit a wall shown on the page, the difficulty I’ve had is being able to see when and for how long the puck hit the wall as it is needed to find the average force in the system. Each dot on the page is 30milliseconds apart.

Currently my task is to count number of iterations of golden section search verus interval bisection search of a function y = x^2. Golden section search took about twice the number of iterations than interval bisection search. If I lowered the golden ratio from 0.618 to 0.5562 , the number...

I am trying to model numerically the following system: A rigid body mass is rotating freely around an axis (no rotational stiffness/damping) within a range, let's assume plus-minus 3 degrees for now. Case A. The external forces on the mass are low and keep changing which results in the situation...

This problem is from David Morin's classical mechanics textbook: I am having trouble with Part b. Here is the textbook's answer: I do not understand why large particle energies lead to capture. I would think that smaller energies would lead to capture because the particle wouldn't have enough...

This situation is really confusing me. First of all, does accounting compressibility affect the measurements for CL? If yes, how does CL change as a function of the increasing mach number? Back to the problem, above is the "in-flight" lift curve for a plane traveling at high speeds, so the CLs...

In the 7th edition of the book "Elements of Electromagnetics by Matthew N. O. Sadiku" On page 190 the author goes on to say: "We now consider the case in which the dielectric region contains free charge. If ##\rho_v## is the volume density of free charge, the total volume charge density...

In a recent news article, a Frontiers Airline passenger became very unruly after two alcoholic drinks. On an airline flight, the only ones instructed on the combined effects of alcohol and altitude are the cabin crew. This is what the FAA has to say to them: Since issues related to alcohol...

When a giant tsunami wave spread out from the site of the dinosaur killing Chicxulub impact, it left traces of its passing in giant ripples on the seafloor (as described in this news article in Science): The research article is here (but not accessible to me). The size of these ripples is...

And if a star is severely stretched by tidal force, how does that affect its magnetic field and the process of it collapsing at the start of a supernova?

Hi, I'm studying how distance affects the impact of magnet collision. Would like to have some idea before conducting experiment. Imagine 1. holding a magnet at different distance near a fixed metal 2. release the magnet; the magnet attract and collide to the fixed metal Will the distance affect...

In derivation of relation for pressure of Gas ,(see pic below) the time for rate of change of momentum of molecules should be the time for which the wall of the vessel and the molecules kept interacting with each other, not the time between successive collisions. As circumscribed below, my...

How much will this phenomenon affect the Earth's rotation? Is it possible that the change in the Earth's rotation movement will significantly affect agricultural production on a global scale, for example?