What is Vertical: Definition and 1000 Discussions

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...

If I know the theoretical acc down is 9.8 and I have the actual acceleration to be 9.2, do I use 9.8-9.2 to find the air resistance force? Or do I use 9.2-9.8? And then after that, do I multiply it by the mass? Or do I calculate both forces and then subtract them?

Hello everyone, I am trying to model the flow of steam through a vertical cylinder. Ultimately I would like to find the surface temperature as a function of the length of the pipe. I am assuming the steam cools as it moves upward along the length of the pipe and it is a steady-state process...

Homework Statement Say if you have water in the bucket and you spin it around really fast creating a vertically cricle. How come it won't fall on you when its at the top? Homework Equations The Attempt at a Solution

How many experiment measured the vertical speed of light? I wonder, how can gravity affect it?

This has already been asked: https://www.physicsforums.com/showthread.php?t=77835 It is a simple question but I am confused, if the slit or the slits are vertical the direction of the pattern is horizontal or vertical? Vertical: | | |...

Homework Statement A 4kg bucket of water is rotated in a vertical circle of radius 2m at the minimum rate required to keep the water in the bucket. Find the tension in the handle of the bucket at a) the bottom of the circle and b) the top of the circle. mass: 4kg radius: 2mHomework Equations...

I have this problem where a pole is vertically balanced, and there are three wires attach on top of it. The wires are fasten to the ground. It looks like a three side pyramid. The question tells me that one of the cable has a tension of 6000 Newtons. How can I find the tension on the other two...

Homework Statement In an ink-jet printer, drops of ink are given a controlled amount of charge before they pass through a uniform electric field generated by two charged plates. If the electric field between the plates is 1.5x106N/C over a region 1.20cm long, and drops of mass 0.12nanograms...

Homework Statement Two blocks (m1 and m2) are being pushed to the right along a frictionless table with such a force that the left block (m1), which is smaller, is above the table and not falling. It is pushed up against m2 (which is on the table), and they have a coefficient of static friction...

Homework Statement 1. Homework Statement A block of mass 0.015kg enters the bottom of a circular, vertical track with a radius R = 0.3m at an initial velocity of 4/ms. If the block loses contact with the track at an angle of 130 degrees, what is Wk, the work done by kinetic friction...

Homework Statement Gravity is assumed to be 10ms-2 throughout. A ball is thrown vertically upward with a speed of 14ms-1. Two seconds later, a ball is dropped from the same point find where the two balls meet. (They will meet when they are the same displacement (s) from the starting...

How do I calculate vertical velocity? I feel very silly for asking this question, as I should know this and is very basic. I don't seem to get it from any of my books and it is the quick,, thus, I can't contact my teacher or friends as I don't have their email or skype. If I can't still work it...

Homework Statement a piece of 4cm elastic stretches to 6.5cm when 100g mass is added. the same piece of elastic is now swung with constant angular velocity in the vertical circular direction. find the length at the top and bottom of the circular motion when Time=0.2s Homework Equations...

A well known physics experiment is dropping a magnet through a vertical aluminum tube. The magnet slows noticably before passing completely through the tube. Electrical current is created in the aluminum tube thereby creating a magnet thereby creating an opposing magnetic flux to slow down the...

Homework Statement Hang a weight (F) from the middle of a horizontal wire of length L, attached on both sides. The wire has an effective modulus (E) and effective area (A). Find an equation for the new length of the wire LF. (NOTE: Do not try to solve for a form LF =, this is too hard)...

I'm trying to plot something like x+y=2 in 3D. The image should look like this: Been trying to do it in Mathematica using Plot3D, but the it treats the input as a function of z. Another example: Plot3D[x=4,{x,0,10},{y,0,10},AxesLabel{x,y,z}] plots z=4, not x=4. A similar thread, with no...

Homework Statement What assumptions do we make to rule out vertical or horizontal indifference curves when slope is zero? Homework Equations There are several assumptions: completeness reflexivity transitivity being continuous strong monotonicity diminishing marginal rates of...

Homework Statement Explain why each of the following functions have or do not have vertical, horizontal, and/or oblique asymptotes: (a) f(x) = e-x x5 + 2/ x5 − x4 + x3 − x2 + x + 1 (b) k(x) = sin(1/x) arctan(x) Homework Equations The Attempt at a Solution For the first one, to...

Homework Statement A 1.60 kg, horizontal, uniform tray is attached to a vertical ideal spring of force constant 195 N/m and a 280 g metal ball is in the tray. The spring is below the tray, so it can oscillate up-and-down. The tray is then pushed down 15.0 cm below its equilibrium point (call...

When calculating vertical motion at an angle you use sin, when horizontal you use cos, I don't understand why.

Homework Statement A basketball player achieves a hang time of 0.978 s in dunking the ball. What vertical height will he attain? The acceleration of gravity is 9.8 m/s^2 Answer in units of mHomework Equations ? The Attempt at a Solution 9.8/0.978^2= 10.245 Homework Statement Homework Equations...

Hi, it's my first time on these forum, so I hope that I made this post correctly. I have an example solution to this problem using tensors and matrices ^^ but I wanted to solve the problem in a different way and would like some feedback on whether or not this solution is correct. Homework...

Hello every body... Consider two port system having a resistor (can it be called two port system?)... ____---->I1________________I2_<----_________...

Homework Statement A 1.62 kg object is swung in a vertical circular path on a string 1.8 m long. The acceleration of gravity is 9.8 m/s^2. If the speed at the top of the circle is 5 m/s, what is the tension in the string when the object is at the top of the circle? Answer in units of NHomework...

Hello. I apologize if I put this in the wrong section. I got this problem with the assignment I am currently working with. I have to set the position function for motion as a parametric equation for motion in circular motion, horizontal and vertical respectively. While I do know the...

A lot of problems I see have vertical mass-spring systems, where a mass m hangs from a spring with spring constant k stretching it a distance D, and usually all but one of those quantities is known. But would you equate the forces or the energies, i.e. which is the correct equation to use: mg=kD...

If you have a falling object and wind in the horizontal direction, the object ends up falling to the ground at an angle. Why does the drag force only have a vertical component? Thanks!

It is often said that the paths of light bend, close to a neutron star? What happens if the ray of light is vertical to the surface . If we take into account the spacetime of that inertial body, the constancy of velocity of light holds, (or does it?). But shall we (as outside observers) ever...

Homework Statement An homogeneous rod is fixed to an extremity and is rotating around a vertical axis, doing an angle of theta with the vertical. (in the scheme I made I wrote alpha but it's theta! (θ)) If the length of the rod is L, show that the angular velocity needed to make it turn...

Hi everyone, I'm studying Motorsport Engineering and am trying to do an in depth analysis of a vehicle double wishbone suspension system. I have been using Excel to model the behaviour of certain aspects, and I am currently trying to analyse the effect of a wheel hitting a bump and it's...

A ball of mass 0.6 kg, initially at rest, is kicked directly toward a fence from a point 20 m away, as shown below. The velocity of the ball as it leaves the kicker’s foot is 17 m/s at angle of 52◦ above the horizontal. The top of the fence is 7 m high. The ball hits nothing while in flight and...

Hello All, I'm currently in the process of designing a numerical model for a vertical axis wind turbine, more specifically, a straight blade giromill. I'm currently having trouble because depending on the variables I choose, I can produce more power than available from the wind. My...

Homework Statement A stone is tied to a rope. The rope is spun vertically clockwise in circular motion. The rope has a constant speed. Draw four free-body diagrams of the stone when the angle between the rope and the positive x-axis is 0, 90, 180, and 270 degrees. 2. The attempt at a solution...

Homework Statement Electrons moving initially at 2.4 X 106 m / s in a horizontal direction. They enter a region between two plates of 2 cm in length and are subjected to an acceleration of 4x 1014 m/s2, vertical and pointing upwards. Determine: a) the vertical position of the electrons as...

Hey guys, So I have just learned that the formula for a fluid's hydrostatic pressure (let's say water for the purpose of simplification) in terms of depth is: P = ρ * g * h Now I have been reading a bit on my textbook and I found out that the derivation of this formula is based on the...

Homework Statement "A rod of mass 4.0 kg and length 1.5 m hangs from a hinge. The end of the rod is then given a 'kick' so that it is moving at a speed of 5 m/s. How high will the rod swing? Express you answer in terms of the angle the rod makes with the vertical.Homework Equations KE(rot) =...

I need help! I understand regular projectile, but when it comes to using an angle it drives me crazy! The vertical distance is 15.01 m Horizontal distance is 21.84 m Angle is 45° I figured the time to be 2.1 sec I need the velocity And VsubF is 0...right? I just need the help guys, thanks

I need some help with this problem, to check if my answers and formulas are right/how to solve the last parts... A 0.25kg block is dropped onto a vertical spring with spring constant k= 250 N/m. The block becomes attached to the spring and the spring compresses 0.12m before coming momentarily...

Homework Statement f(x,y) = x2 + y2 P(9,6) v=<2,4,0> 1)Find a vertical plane that passes through the point P(9,6) and has the vector v=<2,4,0> 2)What is the vector function of the curve of intersection of the vertical plane and z=f(x,y) Homework Equations A(x - x0) + B(y - y0) + C(z - z0)...

[b]1. Homework Statement A particle of mass can slide without friction on the inside of a small tube bent in a circle of radius r. The tube can rotate freely about the vertical axis, x3, and has a moment of inertia I3 about this axis. Homework Equations a) Derive the Hamiltonian for...

Hello. Im bilding a device. I have 1m vertical pipe with fan in the bottom and stepper motor at the top with sliding ping pong ball in it. (pipe d=45mm, ball d=40mm 2.7g) Stepper controls ping pong high in the pipe. The device is working but mehanics is not my aria at all so...

If this sounds ridiculously vague, I apologize - my physics teacher gave us this problem verbally and didn't want to clarify anything. Homework Statement A ball is thrown at a 45 degree angle to the ground and remains in the air for 2.35 seconds by an individual standing 1.81m. How far did...

Hi, I eager want to know about how to calculate the vertical G-force.I have some ideas but I do not if it is right or not.I just calculate the acceleration first,then use a/9.8 kg/N or m/s^2. Is this formula right or not?Is someone can tell me? Thanks in advance.

[b]1. A 0.20kg ball with an initial velocity of (26i-1.6j)m/s collides with a vertical wall. The wall exerts a constant force of -175i N on the ball and the ball's final horizontal velocity component is -15i m/s. Find the final vertical velocity component of the ball. [b]2. I know how to...

Homework Statement Block C (m= 4 kg) sits on a frictionless horizontal surface. Block B of (m = 2kg) sits on top of block C, and is attached to a rope that runs over the massless pulley as shown in the figure. Block A (m=1 kg) hangs vertically from the rope. With what horizontal force F must...

Homework Statement Supposed to support a 50 kN weight at a pin joint at the center of a void as cost effectively as possible using trusses (e.g., trusses and pin joints have costs) Homework Equations Basic sum of moments and sum of forces = 0 The Attempt at a Solution Why can't I...

Homework Statement What force is needed to move a 10 pound block up a vertical wall at a constant speed by pushing at an angle of 53 degrees with the vertical? Mu=0.3 At what minimum angle with the vertical would you be unable to push the block at all regardless of how large the force...

Hi all I hope you can help I'm really racking my brains about this! The question simply states that a cannonball is fired over a wall 40m away and passes directly over the wall at a height of 15m. Find the vertical component of velocity? I've been searching the net and apparently when V...

Homework Statement A small block with mass 0.0325 kg slides in a vertical circle of radius 0.475 m 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, point A, the magnitude of the normal force exerted on the block by...