What is Vertical: Definition and 1000 Discussions

Homework Statement A 115kg mail bag hangs by a vertical rope 3.3m long. A postal worker then displaces the bag to a position 2.2m sideways from its original position, always keeping the rope taut. As the bag is moved to this position, how much work is done by the rope? Homework Equations...

Is there any decent way to quickly spot if I should divide a 2d figure defined by functions into horizontal or vertical strips when solving centre of mass problems? Or does it come down to experience and/or math-talent? Problems like the1 in this video is what I'm on about...

Homework Statement An 85-kg person steps into an experimental car of mass 300 kg, causing it to sink 4.5 cm on its springs. If started into vertical oscillation, and assuming no damping, at what frequency will the car and passenger vibrate on these springs. Homework Equations ω=√k/m...

I have asked many times this question to many people and have many different answers: Let X be a widebody jet airliner like an Airbus or Boeing, larger than a typical business jet. Can X do a vertical loop manoeuvre? If X cannot, what is it that stops X?

Hi, So, I have a doubt regarding the equations for vertical oscillations on a spring. My book says the net force on the block is: F = k(d+y) - mg. If we define d the distance at -kd = mg. I, don't understand, the reason being: When the block is moving downwards, if its performing...

I have this device, It has 3 masses 30 grams each (Red ones) the other masses are not considered. The masses are spinning at 600 rpm at that velocity this will reach maximun radius. The maximun radius the masses and reach due to the centripetal force is 15cm. Can this device push a 3kg mass at...

help is urgently needed please and thank u. 1. When a 13.2-kg mass is placed on top of a vertical spring, the spring compresses 5.93 cm. Find the force constant of the spring. 2. If a spring has a spring constant of 400 N/m, how much work is required to compress the spring 25.0 cm from...

Homework Statement I need to find the horizontal vectors and vertical vectors at launch, maximum height and at final catch of a projectile. I know that the distance between point A and point B is 5 and the total time is 1. Homework Equations How can I also find the maximum height and the...

Hi, I was unsure how to describe what I wanted using words alone so I created a GIF to help. Or view here - http://makeagif.com/i/k7rF6T I am pretty unschooled in the world of physics so please forgive my lack of understanding. Firstly, the force that would cause the ball to move...

Homework Statement Alright we had a lab and we threw water balloons off the college's stadium to determine the height.In result the I got 9.2m from an average of 1.37sec using y=1/2gt^2 Okay, this is where i get confused to use the right equation to determine vertical velocity...

Homework Statement Find a parametrization of the vertical line passing through the point (7,-4,2) and use z=t as a parameter. Homework Equations r(t) = (a,b,c) + t<x,y,z> The Attempt at a Solution I used (7,-4,2) as (a,b,c) (the point) and used <0,0,1> for the vector since it had...

Hi guys Just seeking some clarification here as my prof has been very vague. Say we have a mass hanging off a vertical wire - the force upon that wire will be by F =MA, (m x9.81)N. I understand this. But say we had a wall upon which we put a static horinzontal load/force of 10kg of...

A rookie quarterback throws a football with an initial upward velocity component of 16.5 and a horizontal velocity component of 18.3 . Ignore air resistance. A)How much time is required for the football to reach the highest point of the trajectory? I got 1.68s which is correct B) How...

Hello, Can some explain to me how to calculate the power coefficient of a vertical axis wind turbine. If you explain the steps invloved would be great or any external file location where I could refer. I have below information 1) Lift Coefficient. 2) Drag Coefficient. 3) Angle of...

A baseball is thrown horizontally off a cliff with a speed of 10 ms-1. What is the vertical distance, to the nearest tenth of a meter, that the ball has fallen after 4.7 seconds?

Homework Statement Homework Equations None The Attempt at a Solution I was able to find a vertical asymptote at x=-3/8 by setting the denominator to 0 and using the quadratic formula to find the roots. However, I am unsure of how to find the horizontal asymptotes, and I am not...

Homework Statement What is the vertical distance between the point A(−2,−3) and the line 2x+5y=3. Homework Equations The Attempt at a Solution Here is what I did: I know its wrong. First, changed the equation into proper form: y = 2/5x - 3/5 Plotted the equation...

I was looking through a Taylor's Classical Mechanics chapter and I have a question about the derivation. So basically, it starts out with m\dot{v}_{y}=mg - bv_{y} and you find v_{ter} by letting m\dot{v}_{y}=0 where when you solve for v_{y} you will get v_{ter}. Now the book states how we...

Homework Statement A liquid initially fills the inside of a vertical tube of length L and inside diameter D. The tube is capped at both ends. Then the caps are suddenly removed, and the liquid flows out of the bottom of the tube as a continuous stream until the tube is nearly empty. Assume...

I'm doing some research on Vertical Farming with the end goal of creating a facade in an existing building. I'm trying to make a recommendation on what sort of glass to use on the exterior to provide light to the crops. Does anyone know of any good resources or glass suppliers?

Homework Statement https://dl.dropbox.com/u/64325990/math.PNG The Attempt at a Solution So what I did was set up an system of equations such that the sum of the horizontal forces = 0 and the sum of the vertical forces = 0. I ended up solving for the tension in the rope BC and then found...

Hi If a person jumps(countermovement jump) then there would be 2 impulses that is the 1st impulse would be when person sits down, getting ready to jump and the 2nd impulse would be when he jumps back on to the ground. 1)I want to know the relationship between these 2 impulses. 2) How can we...

Ideal pulley and strings, no friction.The pulley and the second string don't move. I need to find the numerical value of theta, the acceleration of the two blocks and the tensions.Accelerations and tension must be given in terms of m and g.I guess 2T1=T2 T1=m2*a m1*g-T1=m1*aTo find theta I need...

Homework Statement "A side view of a simplified form of vertical latch is as shown. The lower member A can be pushed forward in its horizontal channel. The sides of the channels are smooth, but at the interfaces of A and B, which are at 45 degrees with the horizontal, there exists a static...

A small body $A$ starts sliding from the height $h$ down an inclined groove passing through into a half circle of radius $h/2$. Assuming friction to be negligiable, find the velocity of the body at the highest point of its trajectory(after breaking off the groove).

A vertical spring with constant 200N/m has a light platform on its top. When a 500-g mass is set on the platform, the spring compresses 0.0245m. The mass is now pushed down 0.0755m farther and released. How far above this latter position will the mass fly? The answer from the book. If it does...

Could you please help me to understand some basic concepts about antenna polarization. The books I have are really confusing and do not have examples that I can learn from. Please look at the attached E plane radiation pattern image I attached (figure 13). The books image (figure 13)...

Homework Statement I just want to know if I am doing this correct please! A wrench is dropped from rest and hits the ground with a speed of 24 m/s. Find the height from which it was dropped and the length of time it took to reach the ground. Homework Equations The Attempt at a...

Hello everybody! I'm trying to write a car simulation but I'm having problems with precisely calculating the acceleration / velocity of the car's wheel. Currently the simulation works as if the Car was lifted in the air, so there is no load (vertical force) on the Wheel. What I have so far...

Problem with opticalmicroscopy of features near vertical sidewall of very deep trench Hi, I posted my question here: physicsforums.com/showthread.php?t=612780 but there may be more specialists here. Essentially I have a feature right next to a very deep vertical sidewall of the deep...

Problem w/ optical microscopy of features near vertical sidewall of deep trench Can you guys give me advice on solutions or opinion on whether I am right about the explanation of the issue behind my problem. Problem: Im having trouble using optical microscopy (top down illumination) to...

Homework Statement A spring is standing upright on a table with its bottom end fastened to the table. A block is dropped from a height of 3.0cm above the top of the spring. The block sticks to the top end of the spring and then oscillates with an amplitude of 10cm. What is the oscillation...

This question is about circular motion in a vertical circle Question 1: would I be correct in assuming that the magnitude for tension is dependant on (a) the weight of the object (b) the position of the object with respect to the horizontal diameter of the circle So above the...

I find hot air balloons and zeppelins fascinating since they can carry significant weight. I watched a mythbuster episode in which they busted the myth that an inflatable boat filled with helium could hover, and carry the weight of a human. The rubber boat couldn't even carry its own weight so...

I was hoping someone could clear this up for me. I've been thinking about it a bit, and I am thoroughly confused. Here is what I have come up with so far. The situation: A horizontal (wheel vertical) gyroscope spinning counter clockwise held up at one end by a string. Now change views so...

Does anyone know a way to get half-vertical lines? I mean, I'd like something identical to /vline , but which starts from the top of the row and only goes halfway down. Similarly, I'd like a line which starts from the bottom and only goes halfway up. Even better would be something like a...

SHM - VERTICAL Surely whether you consider the motion used to establish the SHM system, or the motion as soon as the system is released you should derive the same equation. DISPLACEMENT BELOW EQUILLBRIUM. However, consider a verticle spring with particle attached hanging in equilibrium...

Homework Statement A 330 kg roller coaster car sits on a horizontal track. Ahead of it is a vertical loop with radius of 6.85 m. The car is given an initial speed of 23.4 m/s and the car successfully traverses the loop. What is the maximum amount of energy taken away from the car by friction...

Homework Statement If you twirl a ball attached to a cord in a vertical circle, there would be a critical speed at the top for which the tension in the cord is zero. This is because the force of gravity supplies all the centripetal force necessary to complete the circle. How slowly would you...

Homework Statement An 80-kg pilot flies a plane in a vertical loop. At the top of the loop, where the plane is completely upside-down for an instant, the pilot hangs freely in the seat and does not push against the seat belt. The airspeed indicator reads the 110 m/s. What is the radius of...

Angular acceleration and Torque when rod reaches vertical position?? A rod (mass 1.30 kg, length .670 m) attached to a frictionless axis is released from rest in the horizontal position. What is the magnitude of the torque and angular acceleration when the rod has reached the vertical...

Homework Statement If the object is at the top, the centripetal force (pointing as always towards the centre) is down and negative. ● If the object is at the bottom, the centripetal force is pointing up and positiveThe Attempt at a Solution I thought any force towards the center is always...

I need to find the initial velocity of a trebuchet launch. Data I have is a distance traveled of 11.1 m, time of 1.25 seconds, height of the sling straight up at 1.85 m. Equations I can use are V2 = V1 + a(t) , dy = V1(t) + 1/2(ay)(t)^2 , V2^2 = V1^2 + 2ad and viy = dy / t. Finding the...

Homework Statement Derive the moment of inertia of a solid, uniform density, disk rotating about a diameter using vertical rods. Diagram: http://i.imgur.com/TQIjz.png Only the radius of the circle and the inertia of a thin rod is given Homework Equations Inertia of thin vertical rod = m*r^2...

Homework Statement Not exactly homework, but an interesting problem I found for which I have some questions about the answer. A rod of length r is rotating around a point O with constant angular velocity w. Distance r away to the right from the point O is a rail. The end of the rod with...

What I have given is: A projectile with an unknown mass is launched 90 degrees vertically to a height of 0.650 m with a spring deformation of x = 0.031 m. The initial speed of the projectile is v0=3.6 m/sec and the projectile is resting on top of the spring gun "holder" before launch. Find the...

Hi! I'm trying to work through a script on Riemannian submersions but I have some problems with one proof in particular (or more likely the general underlying concepts). No worries, this is not about the entire proof, but just one step. This is about the quaternionic projective space...

A ball is attached to an inextensible string of negligable mass and hangs vertically under gravity. At time t=0, it is given a horizontal velocity u and begins to move in a vertical circle of radius r. At any time t>0, the ball is at an angle θ to the vertical and has a velocity v tangential to...

Homework Statement An electron moving horizontally at 2.50 x 106 m/s enters a 150 N/C electric field exactly half way between two horizontal parallel plates and follows a parabolic path downwards. Both plates are 14 cm long and spaced 10 cm apart. Determine the vertical displacement of the e-...

Homework Statement The problem is that using a human powered bike-like machine we have to climb up a 16 meter long rope. The total weight of the machine + human is 1300N and the theoretical force delivered by the human is 250 Newtons. The crank is 17cm long (that's the length of the arm, the...