Impact Definition and 956 Threads

Homework Statement A cart is driving on straight tracks with a velocity of 2 m/s. In the opposite direction, with an angle of 60º according to the tracks, a child with a mass of 2 kg is running with a velocity of 2m/s, he jumps on the cart and stays there. - Find the mass of the cart, if...

I have been out of school for a few years so my physics is rusty. I need help figuring something out for my job. I need to know how high I must drop an object so that it hits the ground with an impact of 1000g's. The object is a cylindar and weighs 2lbs. I have been confusing myself. I...

Homework Statement I'm trying to plot the trajectory of a photon near a schwarzschild black hole. I have the equation for the trajectory but I'm stumped by the impact parameter and cannot find out how to calculate it. Homework Equations \frac{d\phi}{dr} = \pm \frac{b}{r^{2}\sqrt{1 -...

Hi, I am performing a set of tests using a pendulum. The test involves a pendulum of length 0.55metres, the weight of the entire pendulum is 2kilos. The test involves letting the pendulum go from a set height and calculating the force when it impacts an object held in a vice at the bottom...

Homework Statement Alpha particles of kinetic energy 9.6MeV are incident on a silver foil of thickness 7.0 micro meters. For a certain value of the impact parameter, the alpha particles lose exactly half their incident kinetic energy when they reach their minimum separation from the...

Homework Statement A force platform is a tool used to analyze the performance of athletes measuring the vertical force that the athlete exerts on the ground as a function of time. Starting from rest, a 61.0 kg athlete jumps down onto the platform from a height of 0.610 m. While she is in...

Homework Statement A projectile is launched from a cliff that is 84m tall with an initial speed of 32m/s at an angle of 25 degrees above the horizontal. The object is in the air for a total of 5.74s. What is its impact velocity and at what angle?Homework Equations Vfy = Voy + ayt Vf^2 = Vfx^2...

1. A red train traveling at 72 km/h and a green train traveling at 144 km/h are headed toward each other along a straight, level track. When they are 950 m apart, each engineer sees the other’s train and applies the brakes. The brakes slow each train at the rate of 1.0 m/s2. Is there a...

Hydrogen has an ionization energy of 13.6eV. If 1eV is defined as the velocity of an electron produced by a potential of one volt. Does this mean that a free electron contained in a hydrogen gas could cause impact ionization if a potential of 13.6 Volts were applied to a metal plate within...

hi guys, i have been hearing a lot of speculation about planet x / Niburu's orbit taking it through the centre of our solar system in 2012 obviously with catastrophic effects to bio life. the documentaries i have seen on this event have not come sources which i would consider concrete...

A golf ball is released from rest from the top of a very tall building. Choose a coordinate system whose origin is at the starting point of the ball, and whose y-axis points vertically upward. The acceleration of gravity is 9.8 m/s 2 . Neglecting air resistance, calculate the ve-...

Homework Statement A person jumps from the roof of a house 3.4 meters high. When he strikes the ground below, he bends his knees so that his torso decelerates over an approximate distance of 0.70 meters. If the mass of his torso (excluding legs) is 41 kg. A. Find his velocity just before...

I need help finding the forces when an aircraft’s jump cable catches to stop a plane on an aircraft carrier ship. The aircraft is traveling at 110 mph with the front of the plane 3 feet off the deck of the ship. If the assumption is made that the cable stops the aircraft immediately (the cable...

Homework Statement An aircraft is landing on a carrier ship in the middle of the Pacific. When the aircraft’s jump cable catches to stop the plane, the aircraft is traveling at 110 mph with the front of the plane 3 feet off the deck of the ship. If the assumption is made that the cable...

Is there a general approach to calculating the impact outliers have on the accuracy of one's (predictive) model?

I have a scenario which is simply a ball hits the ground from above i know the mass of the ball and the speed in mph of the ball just before it hits the ground. No other variables are known, I need to know the force it hits the ground. What is the best way to calculate it? I had thought F =...

If a apple falls on my head, what is the physical value that makes my head hurt?

What would it be like if a 300 km diameter meteorite hit the early (first 1 Byrs) Archean surface? Hint: a smaller impact on Kilawea surface in Hawaii.

http://www.nasa.gov/topics/solarsystem/features/jup-20090720.html

We went paint balling with 17 friends. At dinner we had an discussion if a stronger weapon would result in stronger hit. The question is? Is their a maximum of energy a paint-ball can give to your body, independent of speed or energy. In other words...Will a bigger gun hurts more than a...

When a golf club strikes a ball, is the ball carried along with the club face for part of the circular arc of motion (after impact)? If so, how does this occur? For instance, I am assuming that the impact takes place at the instant that the club is exactly vertical. I am also assuming that...

Do the electric lines of force necessarily depict the trajectory of a charged particle? Or do they depict the trajectory at all.

Homework Statement A bullet is fired from a cliff 36m above the ground. If the bullet is fired at an angle of 25 above the horizontal, and has a muzzle velocity of 80m/s, what is the velocity of the bullet as it hits the ground? d = 36m vi = 80m/s angle = 25 degrees Homework Equations...

Hey guys, I've got a problem that I have been puzzling over for a long time now. I think that the mass of a beam should not affect the amount that the beam deflects when another mass is dropped on it, however my mechanics lecturer thinks otherwise, i don't understand his logic. If I have a...

Hey guys, I've got a problem that I have been puzzling over for a long time now. If I have a beam, which has no mass, and a weight is dropped onto the centre of the beam, then the deflection is easy to work out, we let the strain energy of the beam equal the potential energy of the mass...

Would a bird strike impact with an in-flight jet propulsion intake have a significantly less probability of avoiding critical damage if the jet intake was fully idle or non-active at the point of impact? Would the air-flow pattern of an abruptly idled engine perhaps even help by greatly...

http://hyperphysics.phy-astr.gsu.edu/hbase/flobi.html" Since the gravitational potential energy of the falling object at the point of impact is higher than the gravitational potential energy at the distance traveled after impact, where does the energy go? It is shown that the KE is removed...

About week ago I decided to make an attept to create multiplayer rpg game in j2me. The game needs server so I use c and mingw32 as compiler. I thought the biggest problem will be network programming as I never tried that before. But the j2me client is connecting nicely I have managed to get...

hi my friends I want some informations to study about gamma wave and interactions of it on humans cells.thancks alot.

Homework Statement A rifle with a barrel length of 50.86 cm fires a 7.06 g bullet with a horizontal speed of 449 m/s. The bullet strikes a block of wood and penetrates to a depth of 12.9 cm. What resistive force (assumed to be constant) does the wood exert on the bullet? 5516.6785...

Homework Statement A ball is thrown toward a cliff of height h with a speed of 23.88 m/s and an angle of 52° above horizontal. It lands on the edge of the cliff 3.49 s later. What is thy ball impact speed? 2. The attempt at a solution shouldnt it be Vx= Vo*cos(theta) Where...

Hello eveybody. I am attempting to solve a complex problem in a simple manner. I am not a physicist so stick with me lol. The Problem: The problem is based around determining the maximum force of a object colliding into a fence like structure. The object weighs 8kg and is...

A 35.0-g bullet strikes a 4.7-kg stationary piece of lumber and embeds itself in the wood. The piece of lumber and bullet fly off together at 8.0 m/s. What was the original speed of the bullet? I don't know where to begin...

Homework Statement A hammer slides 21 m down the side of the roof inclined at 60 deg. above the horizontal, and falls down to the lawn 11m below the edge of the roof. How far away from the wall will this hammer impact with the lawn? m = 1 kg mu = 0.23 Homework Equations...

I am working on a ballistics model, and have been trying to find some material on impact forces. Does anyone have any reference material for creating an approximation of the brittle behaviour of materials over short time scales? At sufficient impact velocity a material will appear to be more...

If there is a patent that exists in the USA on a machine for example, is there any legal implication of using a similar variant of that machine in the UK? If the patent only exists in the US, then what is stopping it being coppied and patented across europe? Surely this would prevent the...

In another thread (see msg #17 of "Only dirty coal can save the Earth"), user Bystander suggested I lay out more carefully for critical examination the physical basis for the impact of CO2 on climate, so that the assumptions can be seen clearly. This is an excellent idea, and here is my attempt...

I jump off a high bench (5ft high) to the ground. What is the g-force of the impact and how do you calculate it. It seems mass is irrelevant for this Joe

Hello, can anyone help out in explaining what impacts highways could have on the ecology and what procedure and equipment one would need to go about checking them. I've never done anything on Earth science, could someone please help.

So I am taking like this new cs class offered at my school and it like infuses postmodernistic philosophy into the course as we go along. So we are reading **** by Voltaire, watching not just terminator 1 but the far superior terminator 2, the matrix 1 of course the rest you can just...

I would like to hear speculation about Apophis and its possible impact with the Earth in 2036. I am particularly interested in whether earthlings can change the orbit of Apophis if we need to. Is it possible to rendezvous with an incoming asteroid? How fast is this asteroid traveling?

Homework Statement A 11.2m long steel been is dropped from a height of 9.51m. The horizontal component of the Earth's over the region is 18.5x10^-6T. What's the emf in the beam impact just before the impact with the earth, assuming its long dimension remains in a horizontal plane, oriented...

Hey, I would like to design a lightning pole to be installed on the street (or in parking lots). The height of the pole is about 1m. I would like to calculate the impact of a car heating the pole in order to evaluate the damage to the pole (and to the car). I know the car mass...

A cart (m1 = 110 kg) is moving to the right along a track at v1i = 17 m/s when it hits a stationary cart (m2 = 390 kg) and rebounds with a speed of v1f = 7 m/s in the opposite direction. a) With what speed does the 390 kg cart move after the collision? I used conservation of momentum...

Homework Statement Using energy conservation and assuming negligible air resistance, calculate the impact speed of a 4.00 kg cannon ball after being dropped from a height of 55.0 m. Homework Equations KE sub total=KE sub 1+KE sub 2 speed=distance/time gravity=9.8 The Attempt at...

Homework Statement What is the speed of impact of electrons with the screen of the picture tube? Answer in units of m/s. Electrons are accelerated through a potential difference of 15500 V Charge of electron: 1.6 x 10^-19 C Mass of electron: 9.11 x 10^-31 kg Energy of electrons when they hit...

How much weight if any, should be given to public opinion to scientific theories that are, let's say difficult to prove, and could have significance effects globally.

Homework Statement Consider a perfect gas flowing in a constant-area. Duct adiabatically and without friction. Changes in state come about as the result of changes in elevation in the Earth's gravity field. The z-direction is away from the center of the earth, and hence gravity acts in the...

Please forgive my ignorance on what may be simple topics for most of you. I'm just trying to get my head conceptually around a ball launching pet project I'm fiddling with. If you take a rubber (tennis) ball, say of 5 oz mass, and blast it with a sprung plate moving at 70 mph, will the ball...

If a cylindrical magnet with a uniform magnet field were to be rotated at high speed along its polar axis (assuming the poles to be at either end of the cylinder) would there be any change or distortion to the shape (ie pattern of field lines) of the magnetic field?