Impact Definition and 956 Threads

Homework Statement A projectile, launched at A with an initial velovity of 24m/s at the angle θ, impacts the vertical wall at B. Compute the angle θ that will maximize the height of h of the impact point. What is this maximum height? Homework EquationsThe Attempt at a Solution I guess I have...

A ceiling fan has kinetic Momentum in 1 blade hitting a fixed target. Would the design allow the other blades to flex , reducing target impact? If the 4 blades are combined and bolted together at same velocity is different Momentum delivered? Similar q : a human arm is about 8kg and a sword...

I am proposing a collision between Earth and the Centaur 10199 Chariklo (a.k.a. 1997 CU26). For the actual collision information I used the "Impact Earth" website from Purdue University. This is the data I used: 10199 Chariklo (a.k.a. 1997 CU26) Diameter: 248 ± 18 km (334 x 266 x 172 km)...

Hi, Please could someone help me with the following, I have a rotating cutter and I need to calculate the impact force on an inspection window if one of the cutter blades was to separate from the main assembly. The cutter is spinning at 3000rpm The cutter radius is 115mm (rotating radius)...

I was studying about Crystal defects in crystals and came to know that it has huge effect on band diagram.I don't know about their specific impact on band diagram.So what are major impacts of crystal defects on band diagram.?

Hi i have a question regarding torque with impact guns and high torque drills. So i just bought a impact gun which is rated at 1000nm at 2200 rpm how can this have such high torque were my cars engine makes only 400nm at 2500rpm So i guess my question is how can we compare these torques to...

Hello All, I was performing an experiment in which the perod of oscllation of a pendulun at different lengths is measured using a light gate. while performing the experiment i noticed that the string was slightly elastic, differing from the perfect pendulum. I was attempting to figure...

Hi all, I am currently self teaching physics and have come across something i don't know how to do. There are 2 cars, Cars 1 and 2, traveling at a velocity of 60km/h (16.67m/s) in the eastern direction with a gap of 5 metres between each other. Car 2 is in front of Car 1. Car 2 decelerates to...

hi, Trying to look at the impact loads on an object when it is lowered by a crane. Assuming a constant crane lowering speed and a known stiffness of the item onto which the object is lowered. ie a mass being lowered onto a beam at a constant speed. I've looked at the classic impact equation...

Homework Statement Question: A cathode ray tube in a TV has an electron gun operating at 10 kV. a: What is the velocity (in m.s-1) at which the electrons are emitted? Answer:5.9x107 b: How many volts are needed between the deflector plates to move the beam impact spot across a 70 cm screen if...

If I were to have an object that is floating in space, with a radius of 100 m , that is going to crash unto Earth from a distance of 94,725,000 m and a speed of 299,792,455 m/s, how will it affect earth?(in terms of recoil or rebound.)

Hello! I have a question and I was wondering if you guys could help and please let me know if this is totally the wrong place to be writing on. I need to calculate the force on a collision I was in. I have a Scion xB 2006 that weighs between 2360 lb to 2600 lbs. The other car is a Ford...

Hi all, Background: I'm working on a project where I am dropping an arduino with an accelerometer from ~100 ft in the air to measure it's acceleration during free fall and at impact. I need to compare my collected data with predicted models. I have the model for free fall (just 9.8m/s^2)...

Homework Statement in a metal stamping machine, the upper die block has a mass of 35kg and falls from a height of 2m on to a fixed metal block. if the depth of indentation is found to be 10mm, find the average stamping force assuming the upper die block does not rebound. force=work/distance ...

I'm trying to find the impact or penetration depth of a projectile in the (reasonably) most realistic way possible. I assume this has many factors including velocity, the densities of both materials, shapes of both materials, the medium of which the projectile travels through, gravity, etc...

I have a project for my softball team and I need a material, probably a plastic, that is stiff enough to stand vertically for 24-36", yet thin like a broom bristle and can take impact. I don't want to damage the bats or break the bristles! Any help is appreciated! Thanks

Greetings, It's been quite a while since I had to do anything with velocity, friction, mass, and practically any physics over simple calculations. My car was hit yesterday while parked. There were no injuries, and it still drives just fine. The collision was hard enough to deploy the other...

Here is a scenario to further explain. Let's say I am traveling inside of a submarine. I travel within a depth of 100 to 600 feet deep or 4 to 19 atmospheres. How would I and my submarine be affected if there were a hurricane, tsunami, or hurricane above the ocean. Furthermore, does the...

So I did this lab on momentum on jets and the theory is that "a force is applied on the plate due to change of momentum" the jet both impacted on a flat plate and on a hemispherical plate; now i understand that the greater the angle of deflection of the water jet, the greater the change of...

If concert environments are saturated with sound, why don't we witness a change in light colours (frequency shift) or reflection or any other effect witnessed in laboratory experiments documenting acoustic-optic effects?

Hey everyone so I'm having trouble figuring out this problem, it's for HW and I don't want to get an answer I just need help having it explained. I wasn't sure if I needed to use the momentum equation to figure it out. Suppose a 1000kg car is traveling at 20 meters/second before experiencing a...

Hello. Out of nowhere i started wondering about relativity, I got some question that made me curios. If we have 2 cars on the road, car A moving at speed 110, car B moving at speed 120 , if car B touched ( hit or tagged ) car A. Will it be the same impact or the damage done if car A was at...

What is the correct way to calculate the impact force of a 2"x4" flying through the air and hitting a solid cross beam? The knowns are: Velocity: 50 ft/sec Distance To cross beam: 12 ft 2" x 4" Weight: 9 lbs I don't know much the cross beam will deflect on impact, so the stopping distance is...

Hi guys hoping someone is able to answer this albeit a estimated reply. I am trying to figure out the speed I was hit at in a recent accident. I was stationary at a junction (vehicle weight aproz 1470kg) foot on brake was hit from behind (vehicle weight aprox 2000kg) was hit full on driver did...

Hello, Not sure really where to ask this but I couldn't find a good answer so why not a physics forum, because well this involves physics. I just got a gopro for my fpv drone and I am wondering what type of case to get for it, either a plastic or silicone one. If I am going 30+ mph and smack...

Hi everyone, I'm trying to understand why laser diodes need a stronger input current to start lasing when their temperature increases. If I tried to add thermal transitions to the rate equations governing the evolutions of an atom quantum level populations (let's say ##n_{up}## and...

Homework Statement Rock is falling from 10meters 18km/h speed , what is speed of rock just before it touches the ground Homework EquationsThe Attempt at a Solution So in meters its like 5m/s and h=10m so t=2s if h=d , v=t*d=2s*10m=20m/s but i think i somehow should include gravity too so I am...

So I have been researching, I'm no genius, on how to measure the force of a moving object. Now I have seen some of the equations and Newtons law and all but what I am specifically trying to do is figure out the impact force of an arrow. eventually this will be calculated into how much force of...

Hi everyone, I'm having some difficulty comprehending "normal" transmission of stress/strain through a solid body and "shock" transmission of stress/strain. Imagine I have two bodies, one rigid - the other elastic. If the rigid body is fixed in space, and the elastic body is flying at the...

Hello all, Could desertification exacerbate dust storms so much, and thereby destroy agriculture on earth? (due to the drop in temperature and sunlight) Also, under what kind of circumstances would desertification spread so much so that all plants on Earth would become extinct? If such a thing...

Homework Statement How does the method of cable installation and other external factors influence the required cable cross sectional area for a given circuit Homework EquationsThe Attempt at a Solution I've been searching for the answer for this for ages. I only find answer relating to types...

Will a four cycle, internal combustion engine have greater thermal efficiency with a relatively cool jacket water temperature, say 160 degrees F, or a relatively hot water jacket temperature, say 190 degrees F? These specific numbers are only important in as much as they are commonly available...

It is mentioned in my Textbook that if alpha-particle has large impact parameter, it gets scattered through small angles and vice versa. I understand that impact parameter is defined as the perpendicular distance between the path of a projectile and the center of the nucleus. I am unsure how...

Homework Statement A car moving at 30 m/s has a collision and comes to rest in 0.1 seconds. The driver, ClarkGriswold, is brought to rest by an air bag in 0.13s. The driver has a mass of 50 kg. 1) What average force is exerted by the air bag on the driver ? 3) How far does the driver travel...

Out of the 6 remaining Millennium Prize Problems, two concern physics, the Navier-Stokes smoothness problem and the Yang-Mills mass gap problem. What I'm curious about is, if both problems were to be solved right now, what would be the immediate experimental and/or technological impacts of the...

Homework Statement This is the problem 3.34 from Goldstein, 3rd Edition: Consider a truncated repulsive Coulomb potential defined as V=k/r, for r>a and V=k/a, for r<=a. For a total energy E>k/a, obtain expressions for the scattering angle ##\Theta## as a function of ##s/s_0##, where ##s_0##...

Homework Statement Bob passes a 0.220kg puck with an initial velocity of 12m/s [South] to Dave. Dave one-times the puck with a force of 368N [N30E] if Daves stick is in contact with the puck for 0.250s what is the final velocity? Homework Equations i honestly don't know where to start with...

Homework Statement Homework Equations MaVa1 + MaVb1 = MaVa2 +MaVb2 The Attempt at a Solution I found Va2 = 2 m/s e is found to be 1.75, correct?

Homework Statement Homework Equations mv1 + mv2 = mv1' +mv2' The Attempt at a Solution (0.17) (10i - 4j) + (mass of stick) (v j) = (0.17) (sin 20 i + cos 20 j) what do i need for the mass of stick?

1. problem: a body of mass started to fall from rest, and from S elevation. what is the equation that calculate the force of what this body will hit the ground? Homework Equations :[/B] F=mg // which is used to calculate the force of the body on the ground when it is already on the ground...

Hi, I have been doing some research about imapact toughness of steel and found a paper comparing toughnesses of 4 different steels using the Charpy impact test. The following is a link to the paper mentioned. https://drive.google.com/file/d/0B363OnUPK7-deGJDdkhwVU9SQ2s/view?usp=sharing At...

I searched engineering calculators and they rely on the input you know the stopping time or the stopping distance - easy for a car but not an egg. Knowing either of these quantities makes the problem trivial, but how to estimate or calculate them?? What is the best assumption for either and...

In my science fiction universe, I have a small technology called a 'Kinetic Absorption Module'. It's not mentioned very often, but it's a key component of my supersoldiers' armor. How it works is it acts like a shock absorber, but within a small, one inch long by one and a half inch wide...

Is the impact parameter more dependent on the scattering center, the incoming wave, or both?

Hi guys, Can you help me with my problem please? if a steel ball 10 kg falls from 1 metre (free fall) and hits a concrete beam, how can I solve a single degree of freedom system to get the impact force and compare it with the test? Acceleration of the steel ball is known (so impact force can...

Homework Statement During a Formula 1 race a car that was traveling at a speed of 172.8 km/h crashed into a wall. When the car hit the wall it came to a complete stop in 0.0272 s. If the driver of the car holds a mass of 70kg, calculate the impact force he experienced. Homework Equations I...

Hi PhysicsForums, first post! So I was wondering how much energy would be absorbed by a shock absorbing material before it hit a vulnerable object. I've made a rudimentary sketch in paint to illustrate the situation. I've calculated the Kinetic energy of the incoming object (let's call it X)...

I am currently working on the backstory to a story I'm writing as a means of world-building. However, I'm not quite as physics-literate as everyone else, so rather than winging it and coming off like an idiot, I came here. http://sta.sh/0126svntmin Exhibit A. The red marks the range of the...

Hi guys and girls, I've been working on this problem for a little while now but I'm not really getting the result that I want. This is what I have: I have what is essentially a big pair of vice grips controlled by a hydraulic cylinder. The cylinder opens and closes both arms of the vice grips...

Hi there, I'm new to PhysicsForums, But I need some help finding an impact force sensor that would suit my needs, and I'm pretty new to this so please be patient with me. (Yes, I've tried google, but I am not great at looking for things) Any help would be sooooo extremely appreciated -It...