What is Vertical: Definition and 1000 Discussions

Homework Statement Create a program that displays a vertical bar character ‘|’ moving left to right in 79 positions across the screen, then back right to left across the screen. Homework Equations (16 bit Assembler) The Attempt at a Solution .model small .stack 100h .data...

Homework Statement In the picture below, we see a scene from the days of yore. This is called a tow path and the situation is that a barge is being towed by some horses along the side of a canal. Let's say the horses pull with 6200 N of force at an angle of θ=16∘. If the barge has a mass of...

Homework Statement A rock is thrown vertically upward from the edge of a cliff. The rock reaches a maximum height of 18.6 m above the top of the cliff before falling to the base of the cliff, landing 6.60 s after it was thrown. How high is the cliff? Assume gravity= 9.8m/s2Homework Equations...

This is NOT a HW question. I'd appreciate an explanation of the following: I would like to determine the forces acting on a mass set between two springs of constant k on a slope (the slope's angle is alpha). The slope revolves around the vertical axis with angular velocity w and the mass could...

Homework Statement Two particles, each of mass m and having charge q, are suspended by strings of length l from a common point. Find the angle θ which each string makes with the vertical. Homework Equations F_e = k \frac{q^2}{r^2}, \quad F_G = -mg, \quad F_T = \text{tension on string}...

Homework Statement An object is thrown vertically upward at 35 m/s. The velocity of the object 5.0 seconds later is: Homework Equations vf=vo-gt The Attempt at a Solution g=9.8 m/s vo=35 m/s t=5s vf=? vf=35-(9.8)(5)=14 m/s down I know this is the correct answer, but I'm confused about why...

I am working on a project at my University. It's extra-curricular and not homework related. At the end we will give a report on what we learned during the development. Our team is working on some ideas for a basic robotic climber, that climbs a cable (similar to a seatbelt). What we decided...

Homework Statement A conical pendulum has length (L) 1.5m and rotates at 4ms-1. What is it's angle (θ) to the vertical? Homework Equations r = Lsinθ tanθ = v2/Lsinθg tanθsinθ = v2/Lg sinθsinθ/cosθ = v2/Lg sin2θ/cosθ = v2/Lg sin2θ + cos2θ = 1 The Attempt at a...

1. The Question: A 10.0 g pith ball, carrying a charge of 1.52 μC hangs from a thread attached to a charged vertical wall carrying a surface charge density σ = 3.57 μC/m2. Find the angle that the thread makes with the vertical. Homework Equations [b]3. My attempt: Tcosθ=mg...

Homework Statement Use shell method to find volume. y=x+2 y=x^2 rotate about the x-axis 2. The attempt at a solution I cannot seem to solve this. I thought this was the way to solve it, but I don't understand if I am missing something crucial. This is how I set up the...

Homework Statement Find the points at which the following polar equation has horizontal and vertical tangents: r2 = 4cos(2θ)Homework Equations \frac{dy}{dx} = \frac{r'(θ)sinθ + r(θ)cosθ}{r'(θ)cosθ - r(θ)sinθ} Horizontal Tangent: \frac{dy}{dθ} = 0; \frac{dx}{dθ} ≠ 0 Vertical Tangent...

Homework Statement A vertical cylinder with diameter 9 cm has an outlet on its side with diameter 3cm, water is filled to height 50cm and the outlet is 5 cm above the bottom of the cylinder. the outlet is closed by a valve, calculate the force required to stop the cylinder from moving when the...

I have doubts of how can I put my frame of reference in a simple harmonic motion vertical spring. Normally the books choose the origin in the equilibrium position and the positive distance (x>0) downward, and in this conditions Newton´s second law is: ma=-kx; but instead of putting the positive...

i am still newbie , i don't even know if this question should go here or not , but i will ask it anyway. I have a rod that moves vertically , i need use this rod to make a shaft turn. So i had an idea, what if i made this rod toothed and make it move a gear as it goes up , will that work? if...

Here is the question: I have posted a link there to this thread so the OP can view my work.

Homework Statement When a mass is attached to a vertical spring, the spring is stretched a distance d. The mass is then pulled down from this position and released. It undergoes 57 oscillations in 39.0 s. What was the distance d? Homework Equations F=-Kx F=mg T=2pi*sqrt(K/m) The...

1. Homework Statement This is my first time posting on Physics Forums. I would appreciate your help with a question I'm doing in preparation for the CAP university prize exam in February. The following question is from the 1996 CAP exam. Rod attached by frictionless pin to vertical...

Homework Statement A 76-kg pilot at an air show performs a loop de loop with his plane. At the bottom of the 52-m radius loop, the plane is moving at 48 m/s. Determine the normal force acting upon the pilot. Homework Equations (ƩF)R = maR = m(v2/r) The Attempt at a Solution I...

Homework Statement A mass m=.25 kg is suspended from an ideal Hooke's law spring which has a spring constant k=10 N/m. If the mass moves up and down in the Earth's gravitational field near Earth's surface find period of oscillation. Homework Equations T=1/f period equals one over...

Homework Statement I have an equation f'(x) = (2x)/(3(x^2-4)^(2/3)) Homework Equations Vertical cusps are where the one sided limits of the derivative at a point are infinities of opposite signs. Vertical tangent lines are where the one sided limits of the derivative at a point are...

Homework Statement A 2.0kg pumpkin oscillates from a vertically hanging light spring once ever 0.65s. Write down the equation giving the pumpkin's position as a function of time, assuming it started by being compressed 18cm from equilibrium. How long will it take to get to the equilibrium...

Homework Statement A body is dropped from a height of 300 m. At exactly the same moment another body is projected from the ground vertically upwards with a velocity of 150 m.s^-1. Calculate the … 3.2.1 time it will take for the two objects to reach the same height. The Attempt at a...

Homework Statement A motorcycle has a constant speed of 25.0m/s as it passes over the top of a hill whose radius of curvature is 126m. The mass of the motorcycle and driver is 342kg. Find the magnitudes of (a) the centripetal force and (b) the normal force the acts on the cycle Homework...

Hello. I need help in detecting error. The question in the attached file is to first fill in the blanks with vertical and horizontal parities. Secondly, it says that there is an error in the circled part. My problem is, how do I find that error and why is there an error? In the second image, I...

Homework Statement An object with a mass of 0.100kg is attached to a 0.25m long rope and swung in a circle in the vertical plane. What is the slowest speed possible speed that the object can swing and maintain circular motion? What is the tension in the string at the bottom of the...

Homework Statement Homework Equations The Attempt at a Solution 3.1) 5m.s^-1...Not sure about that 3.2) vf^2 = vi^2+2*a*deltax = 1.5^2 + 2(-9.8)*300 = 76.67 m.s^-1 down 3.3) Wnet = Ek (0.392*300) + Wf = 0.5*0.04*(76.7-60)^2...

Homework Statement A Ball is thrown upwards. What is its initial vertical speed? The acceleration of gravity is 9.8 m/s2 and maximum height is 7.2 m ,. Neglect air resistance. Homework Equations Vfinal squared = velocity initial squared + 2g times change in y The Attempt at a...

How can I measure the power associated with a vertical rotating shaft (similar to the shaft of a vertical axis wind turbine). power=Torque*angular velocity Angular velocity can be found by using tacho meter or spectroscope.. but i am confused how to measure the torque...

I understand how position vs. time diagrams can give velocity. If the line is flat then the velocity is zero (the particle is still), and all the other basic things I need to know, but what if the line was vertical? The slope would be undefined; therefore, velocity would be undefined. In...

I am reading Dummit and Foote on Exact Sequences and some of the 'diagrams that commute' have vertical arrows. Can someone please help me with the LaTex for these diagrams. I have given an example in the attachment "Exact Sequences - Diagrams with Vertical Arrows" - where I also frame my...

how do you get the vector $\lgroup\rgroup$ symbols to extend vertically to include the $3$ and $0$ \lgroup \begin{array}{c} 3 \\ 4 \\ 0 \end{array} \rgroup so that is looks like this https://www.physicsforums.com/attachments/1088

A uniform board of length 90 cm is pivoted at a hinge at one end. It is kept level by an upward vertical force T applied at the opposite end. The weight of the board is 6N. Take moments about the hinge to find T, when the board is level. [b] The hinge exerts an upward force, F on the board...

Hi all,I just started to learn mechanics so please forgive me if i ask something elementary.I have an example from Egor P Popov's Engineering mechanics of solids.(Please refer attachment and sorry about quality of drawing). This is a problem of a pin joint system subjected to vertical load...

Hi, I'm doing some research on developing a physics-based platform game and I want to see how the gameplay will feel if the environment and physics were made to scale as realistically as possible. Since one of the core features of a 2D platformer is jumping, I need some figures on how much...

1. An elevator starts from rest with a constant upward acceleration and moves 1 m in the first 1.4 s. A passenger in the elevator is holding a 4.8 kg bundle at the end of a vertical cord. What is the tension in the cord as the elevator accelerates? The acceleration of gravity is 9.8 m/s^2...

Looks peculiar. How does that plane maintain zero torque with the main engine so far behind?

Hi @ all, i want to simulate the cooling behavior of liquid aluminum in a vertical cylinder(simplified geometry of a real transport crucible), the cylinder is cooled down by the surrounding air from all sides, from top and from buttom, i expect free convection in the liquid to simulate...

1. A particle moving at a velocity of 6.5 m/s in the positive x direction is given an acceleration of 0.9 m/s^2 in the positive y direction for 2.9 s. What is the final speed of the particle? Homework Equations v= vi +at The Attempt at a Solution v= 6.5 + (.9)(2.9)= 9.11 m/s...

1. (a) A particle travels horizontally between two parallel walls separated by 18.4 m. It moves toward the opposing wall at a constant rate of 9.4 m/s. Also, it has an acceleration in the direction parallel to the walls of 3.6 m/s^2, what will be it's speed when it touches the wall? (b)At...

Homework Statement A particle of mass M moving on a frictionless surface with velocity ##V_0## collides totally inelastically with an uniform vertical rod of mass M and length L. After immediately the collision, what is the center-of-mass velocity, the moment of inertia about the...

1. A toy car moving at a constant speed of 3m/s on a horizontal road, heds toward and falls off a cliff. As it falls, it is notices that the car's velocity is directed 80 degrees below the horizontal when the caar has dropped an unknown vertical distance below the top of the cliff. Find the...

Is there any way to nicely LaTeX a "slashed" fraction? In other words, if I want to write $a_1/a_2$ instead of $\frac{a_1}{a_2}$ or even $\dfrac{a_1}{a_2}$, is there a way to make it look nice?

Homework Statement A roller coaster with radius of 19.6 and at the top of the roller coaster the veloctiy is 14 m/s and the apparent weight is 0. Calculate the veloctiy at the bottom of the roller coast? Homework Equations The Attempt at a Solution I can see that Mv^2/r=mg at the...

Hello MHB, I did find a problem in internet y=\frac{ln(x-5)}{x} they say there is a vertical line at x=5 but should there not also be a vertical line at x=0? Regards, |\pi\rangle

consider a pendulum. The mass 'm' is hung and now we are interested in finding the velocity so that it completes one circle. Clearly we can do it easily by conserving energy. Now my problem is with the top most point. Clearly the tension is minimum at this point so that string becomes slack...

Homework Statement Find the vertical acceleration of a car going over a speed bump a foot wide and 4 inches tall.Homework Equations Acceleration = dv/dtThe Attempt at a Solution http://imgur.com/55t2WCQI am getting an answer that is around 25*g I know this is way too much. neglecting the shocks...

Homework Statement A ball is projected vertically upward with a velocity of 30m/s. It strikes the ground after 8's. 1.1) Determine the height of the building 1.2) Find the height of the ball relative to the ground as well as its velocity at t=3 and t=5 1.3) At what time will its...

Homework Statement A thin vertical rod of mass m and length d slides on a frictionless horizontal surface with velocity Vo to the right. It his and sticks to a small lump of putty and rotates about the putty at point O. (a) Find the angular momentum of the rod about O just before and just...

whats the the Rayleight number formulae of vertical cylinder in natural convection?

Hey ya'll ... I just need clarification on this solution. Is it correct in me saying the vertical component is negative as the ball is falling to the ground? Also, I was unsure whether to use the vertical velocity or release velocity in finding the highest point of trajectory Q: A polo ball is...