Impact Definition and 911 Threads

I am a M-tech student working on a project of Drop weight impact testing machine for measuring the crashworthiness of structure. As it will be a lab-scale model, the budget doesn't allow me to include load cells for measuring peak impact force by load-displacement graph. I am planning to...

how would i go about calculating the peak force of an impact between two solids i assume it has to do with the how readily the structure compresses but I am not sure what else might complicate it from there also what if one of the objects fractures and what about granular impacts

Homework Statement A ball of mass 50g is thrown horizontally against a wall such that it strikes it at a velocity of 12ms-1. If it exerts a force of 3N on the wall, determine the time of impact.Homework Equations The Attempt at a Solution I drew the diagram and made the direction and wrote the...

how is the smartest, can do the analysis? Ok when the Airplane touch the runway. the rear wheels touch first, in part of second, the rear tires skidding and then start to spin up. I need to analysis the forces to find: friction torque, skidding, slip ratio,... you can use any data or just...

Hi, I am trying understand if there is a quick way to figure out the impact of the X term in a quadratic equation. For example, by looking at the following equation, I know that it is a parabola (X^2) ; by looking at 24, I know that it is the y-intercept. However, I don't know what is the...

Is There any impact/will there be any: of the concept of Einstein’s New Ether in science today? I red that even though Einstein rejected aether in his relativity theory he introduced it back in 1920 to explain his theory of gravity. I don't know if he ever published it as a theory or it has...

Homework Statement An inspector performed a drop test: He released a plastic electronic product (2kg) at the height 1.3m from the ground. The plastic product than hit the ground, and bounced 0.1m after impact. Time of contact =0.1s Find the maximum force acting on the object during impact...

Homework Statement A spaceship is in a vertical free fall towards an airless moon. It starts out at 1,247,000m above sea level and has an initial vertical speed of -132 m/s. The moon's radius is 200,000m and gravity at sea level is 1.63 M/s^2, but decreases with distance. Calculate the...

Hi there, I'm trying to work out how much force is produced if a climber was to fall onto a rope. I do realize that it would depend on the rope and whether it stretched or not but for this case let's just say it does not have any give in it. If I use the example of a climb who weighs...

Hello readers! I have a question for you: My father designs and builds post pounders (machines similar to pile drivers use to "pound" wooden fence posts into the ground). He has had great success building new and innovative pounders and would like to know just how hard they are capable of...

I am trying to write a program in Action Script that describes the reaction of a horseshoe hitting a stake based on the design of the impact location, i.e., rounded, flat, etc., and the velocity of impact. The location of the center of mass is known. The impact location can vary depending on...

What is the difference between Impact and sudden loading? Explanation with an example would be convenient.

Homework Statement So this isn't a homework question, just something my brother-in-law asked me. He is in the Army, and wanted to know an approximate landing force he would experience when he lands. After attempting the problem, and looking things over, I realized it may be harder than once...

Origin and provenance of spherules and magnetic grains at the Younger Dryas boundary Yingzhe Wu, Mukul Sharma, Malcolm A. LeCompte, Mark N. Demitroff, and Joshua D. Landis PNAS 2013 ; published ahead of print September 5, 2013, doi:10.1073/pnas.1304059110 From the pnas.org overview: The...

Hello, SCENARIO : I am a game developer and I am playing around with rigidbodies. I have a piece of wall which might get impact by an external force. The wall has in turn several other broken pieces (hidden for the moment) put up together to resemble this huge wall. Upon impact I switch...

I'm wondering if there is a calculation that can be used to work out the maximum stress on an object upon impact. Say for example an object strikes a rigid wall, how would one go about calculating the stress on that object?

Why we use v-notch in charpy impact test ?

I have a complicated problem I'd like some assistance with. I have a 17,000 lb vehicle traveling at 10mph and impacting a series of 4000lb jersey barriers connected by a 1" steel cable through the inside of the jersey barriers. The cable will be anchored at each end by 22,000lb blocks...

Ok I've been trying to figure out the difference between dropping something very heavy onto glass breaking the glass and throwing a penny at glass fast enough to cause it to shatter. specifically what I am trying to figure out is how does energy, and change in momentum relate to force...

A projectile shot over level ground hits the ground with a velocity of 65m/s at an angle of 25° below the horizontal. What was the horizontal range of the projectile? 170m 330m 780m 360m If something is launched over a horizontal plane, does Vi=Vf? (same magnitude and velocity) (but...

[b]1. What would be the effect on the impact force of a lower or higher release point of a metal ball in an inclined plane. [b]2. I don't know what to do here.. or how to answer. My teacher told us to include formulas to prove our answers.

Hi, Can anyone please tell me how does crash impact sensors work in an airbag system? Like, I want to know at what force does the sensors send the signals to the airbag control unit. And can these sensors be incorporated to the rear bumper as well? I am planning to incorporate this sensor for...

My goal is to build a software program that simulates the function of the eye. As I (barely) understand things, a single photon can bounce off an object and enter my eye. Q1 - Does the photon determine the color? If not, what determines the color of that single wave/particle? Q2 - How...

Homework Statement A ball is being pulled by a force given by ##F=kv^2##. Where "k" already includes the mass of the ball. After 10m it will run into a wall. The initial speed is 1m/s and there are no other forces involved. How much time does it take for the ball to hit the wall? Homework...

A sphere of mass 'm' collides with a fixed plane with initial speed 'u' at an angle 'α'(alpha). The sphere rebounds with speed 'v' at an angle 'β' with the normal. The plane being fixed remains at rest. We applied Newton's Experimental law( along the common normal(CN) The equation after...

What will the technological impact of Quantum Computing be? What meaningful benefits will Quantum Computing bring humanity? What will be the order of progression of its impact? How will Quantum Computing advance our technological growth curve? Where will the money in Quantum Computing be...

Hi everyone, For current project at work I am looking into possibility of simulating deformation from impact with static force. Here is the input data: A ball of 0.5 kg at speed of 25 km/h crashes into a damping foam which is placed on a rigid wall. Stopping (deformation) distance in the foam...

Hey folks i got a doubt, one of the theories of Albert einstein say everytime we run for example our mass become a little tiny for example one person have 80 pounds when you start run you have for example 79 pounds of weight because of the speed, and when you stop running your mass go back to 80...

If a car with no acceleration, only velocity, hits my spring with a spring constant K What will be the deformation in string? How do I calculate the force from impact while acceleration is equal to 0?

While sitting contemplating life today, I had a thought. Naturally were connected to the earth...The civilizations throughout history had a much deeper profound connection to it as well. The only difference besides technological advances is we wear shoes with rubber soles...Rubber is not...

What was the impact of Max Plank's solution to the Ultraviolet Catastrophe on the Quantum Theory? Who do you think had a more significant impact, Plank of Einstein? Thank you!

Why is the energy of an atom with one electron missing greater than that of the neutral atom?

Homework Statement https://dl.dropbox.com/u/51681259/physics_diag.png Object C & P are moving at the same constant velocity to the right, in the configuration of the image. The friction between object C and the ground is 0. Suddenly the friction increases to μ=0.9 between the ground and...

Homework Statement Uniform sphere of mass ##m## and radius ##r##, rolling without slipping on a horizontal surface at a velocity ##v_0##, hits the end of a rod of length ##l## and mass ##10m##, hanging on a hinge (Figure). Determine how the ball will move and the rod after the impact. What time...

Homework Statement This isn't for homework or anything like that, just something that happened to my mom around 2 years ago that I'm trying to calculate what forces she was subjected to. She and my dad were walking the family dog (not that it's relevant, but I'm an adult and don't live at...

Hi everyone I have been working with materials that can absorb huge impacts. I have recently succesfully created a system that can absorb 4 tons of force acting against it. With a little work around this I can largly increase force absorbing capabilities to 90 tons without major...

if a saab 93 estate approx weight 1600kg is hit in the passager door head on by a toyota avensis weighing 1380kg what speed does it have to be doing to move the saab 10 feet to the side. additional weighs involved are saab plus one person 100kg toyota additional two persons approx 130kg dry...

I need to find reasonable numbers for acceleration of a sledge hammer when striking a mass of rubber? A strong man can raise the hammer to 8 ft, then brings it down hard. What is reasonable velocity of the hammer before it contacts the mass of rubber? How much resilience is there, what is the...

This is from my textbook: I'm slightly confused about the bit underlined in red. Do you think its in reference to the sentence just before where it talks about situations of vehicles remaining tangled? (so for other cases, contact time = impact time, right?) also, I don't really...

Does the institution where an individual receives their PhD degree in mathematics have a significant impact on their career? The question evolves from a merger among universities: If a university is under a merger with another well established university with a much much better reputation in...

Let's say a craft is in an orbit at a height h above a planet or moon. A force acts directly against the craft's direction of motion so as the force vector is always parallel to the surface of the central body. So, the craft will slowly decelerate and impact the surface. What would be the best...

Hi all, I think this question goes best in this section, because I think the answer is something a nuclear or particle scientist could answer. In space, what would happen to a ship that did not have proper shielding from cosmic rays? (NOT the astronauts themselves; there is plenty of...

How many megatons was the pre-historic chixculub meteor impact equal to? This was estimated to be millions of times more powerful than the cumulative explosive power of all of the nuclear weapons in the world combined. It caused the extinction of most life on Earth during that time (namely the...

Homework Statement the vehicle needs to stop as close to a wall that is located anywhere from 9 to 12 m away. (The distance is not given exactly) The vehicle must be self propelled and has other specifications located here...

Ok, so this isn't exactly homework, but it seems the most appropriate spot to post this. A few days ago I (a 220 lb individual) hit an impact from a fall from 3 ft of my entire weight on a single toe against an unmovable object (tile floor) I'd like to know the gforce of that impact...

Homework Statement -- This is out of Rendezvous With Rama by Arthur C. Clarke You know it is 907184 kg and is going 50,000 m/s So how much energy does it have right before it hits the earth? Homework Equations Do I use Fg= Gm1m2/r^2 ? Ek=1/2mv^2? I have ΔE=1/2mv^2 written down as an equation...

I been looking on google and getting help from several people who are trying to help me, but I just can't understand this. It is to advance for me as of now and I need a example to help show me. But I need this for homework so can someone help and provide formula explaining how this would. Be...

Why Poisson kernel is significant in mathematics? Poisson kernel is ##P_r(\theta)=\frac{1-r^2}{1-2rcos\theta+r^2}##. http://www.math.umn.edu/~olver/pd_/gf.pdf page 218, picture 6.15. If we have some function for example ##e^x,sinx,cosx## what we get if we multiply that function with Poisson...

Hi, Can you please let me the impact of current loading for the attached circuit? The attached circuit is a 4-stage dc-dc converter- charge pump. When I give an input voltage of 1V, the output voltage is around 4.6 V using cadence simulations. The expected output voltage is 5V. I am...

if you have a beam or something, anchored at one end and apply a moment at the other end, then the bending stress is given by M*y / I, where I is the moment of inertia of the beam. what affect does the length of the beam (i.e. the distance between the anchor and the end of the beam, where the...