Vertical Definition and 1000 Threads

Homework Statement At the video length 1:25 , why does the vertical component cancel out ? At the video length 3:55 , why does the horizontal component cancel out? Homework EquationsThe Attempt at a Solution I don't seem to understand this part very well for the vertical and horizontal...

Homework Statement a motor traveling at a constant speed is just able to completely go round a vertical circular track of radius 8m The total mass of motor is 210kg i)Compute the angular velocity at the top of the track ii)compute the maximum force on the track Homework EquationsThe Attempt...

Homework Statement :[/B] Two ropes in a vertical plane exert equal-magnitude forces on a hanging weight but pull with an angle of 86 degrees between them. What pull does each one exert if their resultant pull is 372N directly upward? Homework Equations :[/B] x-component= magnitude*cos(theta)...

Homework Statement A thin, closed, insulated cylinder of length L, filled with ideal gas (temperature T, mass M, total amount 1 mole) lies on a table. It is very gently raised to the vertical, after which equilibrium is reestablished. Does the entropy change? What is the temperature change (to...

Hello my name is Pablo, I'm new in the forum and couldn't find any similar post so i decided to ask. I have the following situation: In reference frame S (asumed stationary) there is a stick (length Lo in frame S) which falls from Yo at a vertical speed of 0.6c relative to S. In S the stick is...

Homework Statement An electron with a speed of 1.1 × 107 m/s moves horizontally into a region where a constant vertical force of 3.2 × 10-16 N acts on it. The mass of the electron is 9.11 × 10-31 kg. Determine the vertical distance the electron is deflected during the time it has moved 34 mm...

Hi, I've been trying to solve a problem which i don't even know how to approach. I have a vertical hanging cylindrical beam (free to swing sideways but not around itself), the beam is subjected to an eccentric load, downwards, at the bottom of it. The load is parallel to the swinging plane (it...

Ignoring drag, terminal velocity and friction, input 1143 seconds here: http://keisan.casio.com/exec/system/1224835316 It yields a velocity of 11.2 km/s (Earth's Escape Velocity) at freefall from a height of 6.4 km (a fraction of the height/depth of Everest, Antarctic ice cap and deepest oceanic...

Homework Statement Two mass-less springs with spring constant k = 1000 N/m each have 1 block attached (Spring A is fixed to the ceiling and is attached to a 5 kg Mass A, Spring B is attached and below the 5 kg Mass A and is attached to another 5 kg Mass B at the other end; this system is...

The plate (glass) is 1400 x 700 MM at right angles to the wind. The wind velocity is 42 Metres per second. The height above the ground is 6 metres. Your help to an 85yo would be enormously appreciated. Ian Richards.

Homework Statement A bullet is shot vertically into the air at a speed of 512 m/s. 1) To what maximum height does the bullet go? 2) How much time passes before the bullet stops rising? 3) What is the velocity of the bullet after 60.0 s?[/B]Homework Equations 1) V2²=V1²+2ad 2) a= (V2-V1)/Δt...

Is it possible to find the vertical height of a jump using ground reaction force, mass, and time? I might be wrong, but I think my steps would be to find the impulse, then velocity, then somehow get the vertical height with that..so far I have change in velocities using FΔt / m = ΔV. From here I...

So in designing closed systems, mostly heating systems, I realized today that I've probably been doing one thing wrong all these years. In such a system one doesn't take elevation loss due to gravity into account since you "get it back" on the way down. This I've always been aware of, but what...

Homework Statement A 1.0 Kg mass is attached to the end of a vertical ideal spring with a force constant of 400 N/m. The mass is set in simple harmonic motion with an amplitude of 10 cm. The speed of the 1.0 kg mass at the equilibrium position is. A. 2 m/s B. 4 m/s C. 20 m/s D. 40 m/s E. 200...

I have a construction containing two force sensors. http://postimg.org/image/3zv76lo3b/ The sensors are not able to divide the force into components. If a force is applied that ´tips´ the upper plate, I was wondering if it was then possible to divide the force into horizontal and vertical...

Ok I know this is simple resolving but I'm a bit confused. If we resolve forces in the vertical y direction (as in the attached image), we obtain Rcos(theta)-W=0 and hence Rcos(theta) = W meaning R = W/cos(theta) [where theta = 18 degrees] However, if we resolve forces along the direction of...

At D, by resolving and equating to centripetal force we know that R + W = mv^2/r, however, why do we assume R=0? Based on what? I know my post is short and usually a longer solution is required but I do not have a problem with the maths in the attached, it's just the concept of letting R=0 that...

Hello everyone. I'm typing up a report in $\LaTeX$ and I'm having trouble with some unwanted space. Here is what it looks like with the extra space marked by the reddish rectangles. The images themselves don't have excessive vertical space below them. On the previous page I have included...

Hi this is my first post here. Sorry for this naive question xD I want to calculate antenna gain for which I need the horizontal Φ and vertical θ angle of an antenna beam. The formula for gain is. is it ok to convert the rectangular coordinates of antenna into spherical coordinates and compute...

Homework Statement A vertical mast stands on the north bank of a river with straight parallel banks running from east to west. The angle of elevation of the top of the mast is α when measured from a point A on the south bank distant 3a to the east of the mast and β when measured from another...

Homework Statement A stone, attached to one end of an inelastic string whirls around in a vertical circle of 1.0 m radius. The tension in the string when the stone is at the bottom of the circle is found to be four times the tension in the string when the stone is at the top. Find the velocity...

Homework Statement A block of mass m is on a platform of mass M, supported by a vertical, massless spring with spring constant k. When the system is at rest, how much is the spring compressed? When the spring is pushed an extra distance x, what is the frequency of vertical oscillation...

Homework Statement A uniform vertical beam of mass 40 kg is acted on by a horizontal force of 520 N at its top and is held, in the vertical position, by a cable as shown. a. Draw a free-body diagram for the beam, clearly labeling all of the forces acting on it. b. Calculate the tension in the...

Homework Statement A geologist is at the bottom of a mine shaft next to a box suspended by a vertical rope. The geologist sends a signal to his colleague at the top by initiating a wave pulse at the bottom of the rope that travels to the top of the rope. The mass of the box is 20.0 kg and the...

Homework Statement In a classroom demonstration, the pressure inside a soft drink can is suddenly reduced to essentially zero. Assuming the can to be a cylinder with a height of 13cm and a diameter of 6.5cm , find the net inward force exerted on the vertical sides of the can due to atmospheric...

Suppose a mass ##m## is whirled at instantaneous speed ##v## on the end of an inextensible string of length ##R## in a vertical circle. Let ##\theta## be the angle the string makes with the horizontal, and let ##W## be the weight of the particle. According to the equation: $$T = \frac{mv^2}{R} -...

I wish to give a vertical movement to a heating plate. How can I do it?

Hi all. I'm working on building a go kart, and it's been a very long time since my college trig based physics classes. I'm having trouble figuring out the proper stiffness and length of spring to buy for the suspension. In short I need to know the vertical force generated by a wheel and attached...

Homework Statement Hi guys, I am working through a very long problem and I am stuck at this part. So I have a 70kg human being launched at a 90 degree angle at 15mph. I need to figure out how high in the air he will get before velocity reaches zero again and he begins to fall. Homework...

Example video I made a few years go: Note that most of the air interacting with the ball flows around the ball, as demonstrated near the end of the video where a tube is used to prevent flow around the ball, causing the ball to shoot upwards. The main point of this post is the explanation...

Homework Statement Homework EquationsThe Attempt at a Solution Suppose mass of platform is ##M_1## and that of coin is ##M_2## . The normal force between them is N . EOM for platform (mass M1) = ##-kx+M_{1}g+N = M_{1}\ddot{x}## EOM for coin(mass M2) = ##M_{2}g-N = M_{1}\ddot{x}## This...

Homework Statement A ball is tossed straight up into the air so that it moves in the vertical direction without air resistance. Is there a point where the dot product of the velocity with the acceleration is: a. Zero b. Negative c. Positive d. now assume the ball moves in a parabolic path...

Homework Statement An object A with mass 3m is suspended from a fixed point O by a spring of constant k. A second object B with mass 2m is in turn suspended from A by an identical spring. The system moves along a vertical axis through O. Find the frequencies of the normal modes, and the...

This is another problem I am having difficulty with... I set it up like I've been working the book problems, especially the sphere problems, but can't seem to get the right answer. I feel that I am calculating the radius incorrectly. I know I am supposed to us {x}^{2}+{y}^{2}={r}^{2} and r=1...

Homework Statement The questions asks for the centripetal acceleration of the mass in the vertical circle shown in the picture. It also states the object has exactly enough velocity to maintain a vertical circle. Homework Equations F=ma, a=v^2/r The Attempt at a Solution I've tried solving...

A woman throws a ball at a vertical wall d = 3.2 m away. The ball is h = 1.6 m above ground when it leaves the woman's hand with an initial velocity of 14 m/s at 45°. When the ball hits the wall, the horizontal component of its velocity is reversed; the vertical component remains unchanged...

Homework Statement A plank on which a mass of mass m is put, is executing vertical SHM according to the equation y = sinωt + √3cosωt. At what time does the mass break of the plank and what is the value for the mass to break off ? Homework Equations The modified equation of motion looks like: y...

I want to make sure I have this right before I move on to the rest of this problem! 1. Homework Statement A string with mas M and length L is hanging freely and the mass is uniformly distributed along its length. Homework Equations a: Fend the tension in the string as a function of x, M, L...

Homework Statement An undefinedly long circuit is set vertically besides a current wire. The circuit has a conducting straight wire (the line AB) that can slide over it. The segments AB and CD have both resistance R, and the rest of the circuit has a lineal resistance ##\beta##. How much force...

Homework Statement Okay so these are from movies. I am trying to prove them right or wrong using physics. how can I figure out the pounds of force of a vertical jump when I have the: height of the jump = 6 feet Time to reach top = .797 sec Mass of person = 100lbs 2. How can I figure out this...

Homework Statement A vertical mirror is placed at the origin. A ray of light coming from A is reflected by the mirror so that it passes through B. How far from the bottom does the ray hit the mirror? The coordinates are A = (11.4, 15.9) and B = (15.9, 4.7), in centimetres. Homework...

Homework Statement A vessel of internal volume 9 m^3 is lowered with its mouth downward into fresh water lake until the volume of the air in the vessel becomes 5 m^3. Given that the atmosphere pressure is 760 mmHg, what is the verrtical distance of the water level inside the vessel from the...

(Neglect air resistance in all cases) An object falls down from the top of a high overhanging cliff. How far does it fall in the third second of its motion? I don't know which formula to use. I know that a=9.8ms^-2 and t=3s I think. Apparently the answer is 24.5m. But I don't know how to work...

Homework Statement I am trying to understand what [x^. x^..] means, and information regarding the vertical format it is in . Can someone please help me understand, or refer me to a website that can aid me. Thank you!The system is given by...

Problem statement: An oscillating mass is hung from a vertical spring. Take the potential energy of the system when the spring is at the unstretched length to be zero for both spring and gravity. Calculate the gravitational potential energy, spring potential energy, and total potential energy...

hi pf! i am looking at a simply problem dealing with an upside down vertical pendulum of length ##L## having mass ##m## at the top. i believe my professor wrote that a torque balance yields ##m \ddot{\theta} = mg\sin \theta + f(t)## where ##f## is a torque (i think) and ##\theta## is the angle...

Homework Statement Hello. I was just wondering. You have a simple pendulum . string and a ball with mass at the end. We usually solve examples and we think about conversation of kinetic energy and potentional energy. I was just wandering if there is also something like vertical kinetic energy...

Sure - this seams to get asked a lot but I am not entirely getting my head around it. Why does the double slit provide perfectly vertical interference lines? I understand the premise of why this would happen in a 2d world - the usual wave analogy applies. However, in 3d it surprises me that...

I have to build a new stand for our single compartment concrete laundry tub since two legs of original steel stand are corroded. I want to make the new stand out of angle aluminum to avoid corrosion and also because it's easier to cut and drill. The laundry tub weighs about 135 lbs. I...

Homework Statement Homework Equations Centripetal Acceleration = v2/r Fnet = ΣF The Attempt at a Solution The block exerts a force W equal to its weight on the box at the top most position. This upward W minus W downwards and an unknown F downwards equals a net Fc downwards. So F equals Fc...