Track Definition and 329 Threads

Homework Statement A small block of mass m = 0.50 kg is fired with an initial speed of v0 = 4.0 m/s along a horizontal section of frictionless track, as shown in the top portion of Figure P7.58. The block then moves along the frictionless, semicircular, vertical tracks of radius R = 1.5 m. (a)...

Homework Statement On a banked race track, the smallest circular path on which cars can move has a radius of 116 m, while the largest has a radius of 153 m, as the drawing illustrates. The height of the outer wall is 11.6 m. Find (a) the smallest and (b) the largest speed at which cars can move...

Homework Statement Two masses slide freely in a horizontal frictionless track and are connected by a Spring whose force constant is k. Fid the frequency of oscillatory motion for this system. Homework Equations My professor posted the solution but I am having trouble understanding everything...

Homework Statement A roller-coaster car initially at a position on the track a height h above the ground begins a downward run on a long, steeply sloping track and then goes into a circular loop-the-loop of radius R whose bottom is a distance, d, above the ground in the figure. Ignore friction...

Two parallel electromagnets situated symmetrically on either side of the straight section of an oval track propel a wheeled trolley along the track, so that the trolley is in continuous motion, as long as the current is supplied to the electromagnets. Is this workable? Does the entry and exit...

What is the the 2's complement representation of -14 using 5 bits? 1. (11110)[SIZE="1"]2 2. (10100)[SIZE="1"]2 3. (11001)[SIZE="1"]2 4. (10010)[SIZE="1"]2 I've changed to binary: 01110 Flipped over as in two's complement: 10010 So the likely answer seems to be option 4 Am I...

I know that some AWD vehicles used the gear ratio of a planetary or other transfer gear combined with a gear type torque biasing diff that would allow a natural mechanical advantage to apply more of the torque to the front or rear axle. Why not apply this to a rear diff for circle track...

Homework Statement A Truck is going around a circular track of radius 72m and is banked at 60 deg. A spider is at rest on the side of the truck and the coeffiecient of friction is 0.91, what is the maximum velocity of the truck so that the spider is at rest. Homework Equations F =...

Homework Statement The problem is in the photo below: https://www.physicsforums.com/attachment.php?attachmentid=71928&stc=1&d=1407288108 Text: Figure CP6.74 shows an accelerometer, a device for measuring the horizontal acceleration of cars and airplanes. A ball is free to roll on a parabolic...

Hi all, I am rather new to the forum and am a second year mathematics and physics student if that has any relevancy to the question I have. My passions involve studying things like ballistic trajectories, missiles/drones, explosives, and other sort of weapons with possible military/defense...

Hi guys!, I am in a kind of dilemma and wanted to know your opinion. I am from a very small european country and came to US for a PhD in a respectable university (top 50 in all world rankings). I just finished my PhD in mathematical modeling of turbulent flows and applied for different...

Homework Statement "A funny car accelerates from rest through a measured track distance in time T with the engine operating at a constant power P. If the track crew can increase the engine power by a differential amount dP, what is the change in the time required for the run?" 2. The attempt...

Hello, I've been wondering if there is any way to keep track of the divisibility tree. For instance, 5+5=10, and 1+4=5 and 2+3=5 hence 1+4+2+3=10. Now hypothetically, I know that '1' occurs at location 2, '4' occurs at location 1, '2' occurs at location 4 and '3' occurs at location 1 and they...

Hello all, I am currently a tenth grader. My question is: what should I be doing (or continuing) in order to be a successful candidate for MIT admission? I plan to major in physics/minor in CS or EE. I have been taking all posssible advanced classes at my school. I have been self-teaching...

Hello, I finished an experiment of finding out the track spacing of a CD and a DVD. My laser wavelength was 654nm which I used to calculate track spacing of the optical discs. I got a track spacing of a CD 1.57um which is close to a real value of 1.6um, and the track spacing of a DVD...

Homework Statement A body with mass ##m## can move without any friction on ellipse that ##(x/a)^2+(y/b)^2=1## describe. In ##y## direction homogeneous gravity field ##g## is present. For generalized coordinate we take angle ##\alpha ## defined with ##x=acos\alpha ##, ##y=bsin\alpha ##. Find...

I was just given a new position as a hydraulics engineer. We have a system that lifts large structure using hydraulic cylinders with pneumatic systems and hydraulics fluid. My question is which of these two tracks should I focus on for my PE? I want to go for the most relevant one to this...

So at school we had to make our own experiment, and we tried to make a loop-the-loop. We let a marble go from some height. But now we've got a problem. We had a sensor on the top of the loop, to see how long it does to go to the top of the loop. But it didn't make sense. So I had to fake the...

There is a moving light clock at a certain velocity. For an outside observer, the light just seemed to be traveling in a slant path. So far, it is right for the outside observer, the light is going in a slant path and hitting the top bar and then again returning and hitting the bottom bar...

Hi, Homework Statement I am trying to determine the magnitude of the acceleration, registered by an observer in the lab, of mass m forced to move along a radial track, immediately as it begins moving along the track. Please see attachment. ω=αt and the entire set up is horizontal. The initial...

I've taken online courses in the past at Coursera and the Saylor Foundation and had a mostly good experience with them. I've taken them firstly to learn and secondly on the off-chance that they may provide some (albeit tenuous) evidence of achievement, or at least of intent. They also provide...

Homework Statement A man starts riding on a frictionless roller coaster track at initial velocity v_{o}. At point A the radius of the bend is r. a) What is the maximum v_{o} such that when the cart gets at point A it stays on the track? b) Using you answer in a) what should h' be such that...

anybody here keeping track of ison... I saw a thread on ison but it was inactive for days.So i have decided to make one.So here are latest pics of ison from SOHO its distance from SUN is 7,933,146 km

I had a new slot car race track with step down transformer given to me by my Grand Parents for a birthday present. One thing I did notice, is the car with the lowest internal resistance motor used to go faster, well that's what my Dad told me at the time. I found this to be very true on a...

Accelerometer -- device on a parabolic track EDIT: Picture of problem in its entirety farther down. A device on a parabolic trac moves on the track described as y=x^2. Both in meters A$ find an expression for acceleration using position. B) what is a if x=20cm? My solution. First, I took...

Homework Statement How would I go about solving this Newtonian problem? A truck is going around a circular track of radius 72m, banked at 60degrees. A spider rests on the inside wall of the truck. The coefficient of static friction b/w truck wall and spider is .91. Find the max speed that the...

Homework Statement http://imgur.com/b7y3Khb A small cart slides without friction on the loop-the-loop track, as shown, starting from rest at initial height h. The weight of the cart is W. When the cart is at the point A --- the top of the loop --- the force on the track is 0.6 W. Then what...

Chris Duston's talk on this starts at minute 43 of this video: http://pirsa.org/13070085 If you download the slides PDF first, Chris' slides start at 49/89 of the way, about half way down the PDF file side-rail slide. So you can get to his slides quickly. On the video it takes a little...

While the Goldwater scholarship is new compared to, say, the Rhodes, I was curious about the track record of winners compared to the Rhodes, Churchill, Fulbright. For that matter, NSF Fellowships too. Wiki had nothing on this, but since the award started in 86 and these days it takes a lot...

Hello to all, If you know the direction, wind speed, altitude and weight of the radiosonde (values varies by altitude), it is possible to know the approximate track that the radiosonde does? I have other values ​​such as temperature, pressure, relative humidity and other. Anyone knows...

Hey! Does anyone have an idea about going after BS degree toward accelerated PhD track? Is it a good call? Are there an disadvantages? Any suggestions can come in handy. Thanks.

Homework Statement A motorbike starts from rest at time t=0 and begins to accelerate around a circular track of radius 10m. Eventually, at time t=t1 the motorbike reaches the maximum velocity possible without slipping off the track. What's the minimum length in meters the motorbike must travel...

This is collisions and momentum problem. for some reason it just seems like a short problem and I am use to doing long problems so I am here to check my work. the questions is A 50g bullet is fired vertically up at a 1.00 kg ballistic pendulum . The bullet strikes the block at 1000 m/s...

Homework Statement A car of mass m takes off from rest around a circular track of radius r . Speeding up at a constant rate, the car takes t seconds to go around the track once. What is the magnitude of the net force acting on the car at the end of the trip? Homework Equations a_rad...

Homework Statement Hello I've been doing this experiment which is about momentum and kinetic energy. I'm using an air track and using two carts one 3/4 of the way down with 50g weights I will add to it each time I test it this will be the variable i will be changing the cart will stay...

Homework Statement A ball bearing is placed on a track curved in the vertical plane. The ball bearing is released from a position on the track above the lowest point and it then oscillates with SHM. As the amplitude diminishes does the time period for each oscillation stay the same...

There are two railroads, represented by the curves y=(1/2)x2+7, and x2+y2=1. I am supposed to find a straight line connection so that a atrain can get from one curve to the other. I have drawn a simple diagram to help me picture things: http://i50.tinypic.com/2saeccx.png where (a,b) and (c,d)...

A 6N force pushes to gliders along an air track. The 200 g spring between the gliders is compressed. How much force does the spring exert on (a) glider A and (b) glider B? Mass of Glider A = 400 g Mass of Glider B = 600 g I just want to verify that I solved this problem correctly. If I've...

Homework Statement The Track for this racing event was designed so that riders jump off the slope at 30°, from a height of 1m. During a race it was observed that the rider shown in Fig. 2 remained in mid air for 1s. Determine, 1) the speed at which he was traveling off the slope, ( 2points)...

As a high-speed passenger train, traveling at 88.0 km/h, rounds a bend, the engineer realizes that a locomotive has improperly entered the train's track from a sidetrack distance d= 420 m ahead. That locomotive is moving at 22.0 km/h. The engineer immediately applies the brakes to reduce train's...

Hello guys, I've been doing some simulink modelling about a study that's been ongoing for a while , I've used the single track model to see the yaw rate and sideslip for the given steering angle input , But as you know single track model makes the assumption of vehicle velocity as constant...

small engineering school? I currently attend Oakland University's PhD program. Formerly I was in a larger more well known PhD program but that didn't work out. I got sick and had to leave and decided to stay in my home state of Michigan for my PhD. My dream is to become an excellent...

If human brains can be mapped to processors, I will definitely have a single core processor. I have a one track mind. I can only focus on one thing at a time. I see people working on many things at the same time. But I cannot do them like that. I work like a serial computer. My algorithm goes...

Hey. I was wondering if people could share their thoughts on how they keep themselves on task semester after semester after semester after semester... I find it harder and harder as the years go by to crank out work by riding a wave of energy, imagination, in recent years - caffeine, and -...

Energy, Angular Momentum, Torque, solid ball rolling down loop track? help!? A solid brass ball of mass .280g will roll smoothly along a loop-the-loop track when released from rest along the straight section. The circular loop has radius R = 14.0 cm, and the ball has radius r<<R. (a) What is...

Homework Statement A symmetrical ladder of mass M = (mass 16.2 kg) leans against a smooth, frictionless wall so the top of the ladder is height h = 6.65 m above the floor, and the bottom of the ladder is distance d = 2.69 m from the base of the wall. Since the floor is also frictionless, a...

Homework Statement Okay, so I did a lab for my intro to mechanics physics class the other day and my lab report is due at 5pm tonight and I am having A LOT of trouble. The lab was a frictionless air track glider on a horizontal surface with a fixed mass M connected by a massless string to a...

Calculating Work Done by Friction in a Circular Track (Answered) Homework Statement A small block with mass 0.0425kg slides in a vertical circle of radius 0.400m on the inside of a circular track. During one of the revolutions of the block, when the block is at the bottom of its path, the...

Homework Statement A cart on a level air track is being pulled by a force of weights attached to it by strings on a pulley system at the end of the air track. We know that an air track isn't completely frictionless, so in my calculations during experimentation, how would I account for that...

Hi everyone, I'm new to this forum and I'm having some problem with the question below. Homework Statement A circular track is banked so that a motor cyclist who travels at 40 km/h in a horizontal circle of radius 100 m experiences no tendency to side-slip. If the coefficient of...