Displacement Definition and 999 Threads

Homework Statement A ball is thrown vertically upward from a window at 10m/s. It hits the ground 5.0 seconds later. What is the height of the window from the ground? Given Vi = 10 m/s Vf = 0 Δt = 5.0 m/s Δa = -9.8 m/s^2 Find Δd(w-g) = ?Homework Equations Δd = Vi(Δt) + Δa(Δt)^2 And the...

Hi, in this setup we have a bucket of water 10 kgs of water inside. Attached is a weight meter measuring that in fig a. The weight is exactly 10kgs. In fig b. A piston (red) is being pulled by a weight (z). "z" has a pull force equivalent to the volume of the column of water above the piston...

Hello- I am trying to find a reference describing the z(or c) component of the basis vectors for graphene. I seem to recall that there is a slight bend such that half of the atoms lie slightly above the plane. However, every paper I have found references the perfect 2D lattice of Graphene...

Homework Statement From Tipler & Mosca, Ch. 2, #56 (pg. 57) Bats use echo location to place themselves. (I condensed all of this from the problem) So: Bat flying at 19.5 m/s toward a vertical cliff. Bat clicks. Bat hears the echo 0.15 s later. (click travels at 343 m/s) How close is the bat...

Homework Statement A car moves east at 18 m/s for 5 minutes. What its displacement? It says that the answer to this question from my teacher is: 5400 m. Homework Equations → → X= v *t The Attempt at a Solution → V= 18 m/s [E] t= 5 min. → → → X= v *t =...

Homework Statement I do not know if this is the correct forum to post this in but here goes. I got all of the answers correct, but I just have a question on part F. 1.) The figure shows a motion diagram of a particle in circular motion at a constant speed. The axes have units of...

As you walk to class with a constant speed of 1.65 m/s , you are moving in a direction that is 16.2° north of east. How much time does it take to change your displacement by 25.0 m east? I know that v0 = 1.65 m/s. Would I use the equation: x = (v0 cosθ)t?Any help or advice would be much...

Homework Statement Homework Equations Above The Attempt at a Solution Okay, so I understand I need to integrate the top equation because it's velocity as a function of time. I just don't know how.

Hey everyone. I'm sort of new to the whole physics world (I'm doing it in highschol currently). I have one question that I apparently can't figure out. An object accelerates uniformly from rest. After 7.50s, the velocity is 53.2m/s north. What is the displacement? I first did d=tv and got...

1. Are these two the same? I'm not sure. Sometimes my teacher labels the Y axis with a Delta Displacement [E]. Other times it's just Position (M), so I'm not sure how to identify if we are finding Speed or Velocity. I'm just assuming they are the same. 2. Also, position is a Vector quantity...

Homework Statement A pulley fixed to a rigid support carries a rope whose one end is tied to a ladder with a man and the other end to a counterweight of mass M. The man of mass m climbs up a distance h with respect to the ladder and then stops. If the mass of the rope and the friction in the...

In a hypothetical situation, including every type of hypothetical situations, can a displacement be greater than, less than, or equal to the total distance?

Homework Statement A car travels in a straight line at 40 km/hr for 1 h and 60 km/hr for 2 h. A) How far does it travel? B) Find the average velocity. Homework Equations Average velocity = Δx/Δt (change in distance/change in time) The Attempt at a Solution In solving for A, I...

Homework Statement The displacement vectors A and B, when added together, give the resultant vector R, so that R= A+B . Use the data in the drawing and the fact that = 29° to find the magnitude R of the resultant vector and the angle θ that it makes with the +x axis. I am unsure how to...

Homework Statement A harmonic oscillator has angular frequency ω and amplitude A. What is the magnitude of the displacement when the elastic potential energy is equal to the kinetic energy? (Assume that U = 0 at equilibrium.) Express your answer in terms of the variables ω and A...

A watermelon seed has the following coordinates: x = -6.6 m, y = 2.2 m, and z = 0 m. Find its position vector as (a) a magnitude and (b) an angle relative to the positive direction of the x axis. If the seed is moved to the xyz coordinates (8.2 m, 0 m, 0 m), what is its displacement as (c) a...

Hi everyone, I am taking a physics course this year and I find myself already looking for help unfortunately. I think I understand the basics of adding vectors using Ax = A cosθ , Ay = A sinθ, etc. I am getting confused with the 3rd leg of the trip though. Since it is due west wouldn't that...

Wein's displacement law is E (T,ν) = = v3F (v/T) This is from Omnes' book on QM He doesn't explain why the total radiation is infinite. I'd like to know why.

Hi, Could someone explain how the following two definitions of the displacement operator are equal? The first is the standard one 1) e^{\alpha a^{\dagger}-\alpha*a} But what about this one? This is from a Fock state decomposition of a coherent state. 2) e^{\frac{-|\alpha^{2}|}{2}}e^{\alpha...

The question is: A 56.0 kg bungy-jumper hangs suspended from her bungy-cord, at rest. She is displaced from this position by 15.0 m downward, and then released. She bounces up and down, with a period of 5.800 s. Assume the woman undergoes simple harmonic motion, described by y(t) = X cos(2...

Viruat Displacement? What is Virtual Displacement in D'Alembert principle??Please explain with a good example...:eek:

Homework Statement A child rides on a pony around a circular track with a radius of 4.5 meters. Homework Equations What is her distance traveled and displacement after she has gone half way around the track? The Attempt at a Solution

If this the wrong section to post this, please know that I am very sorry, but I don't know much about any of the things going on, on here so please bare with me. Say you got some powder, and say this powder has a density of 1.06g/cm3 (or 1.06g/mL, right?). Now say you want to put 2500mg...

Hi. I was just wondering if gases displace each other. For example, if I set up an apparatus to produce oxygen gas like the one shown in this diagram would the oxygen produced in the flask displace the air that is already present in the apparatus? Or would the oxygen gas and air simply "mix"?

A car us driven at a velocity of 72km/h EAST for 0.50hr, 48km/h NORTH for 0.25hr, and 62km/h WEST for 0.50hr. Calculate the magnitude of its displacement. Attempt at the solution: Distance = Speed * Time (72 x 0.5) + (48 x 0.25) - (62 x 0.5) = 17km However, the answer in the book...

I'm working on a Java project to simulate Newton's Cannon (example: http://spaceplace.nasa.gov/how-orbits-work/). How do I find the x and y components of displacement, velocity and acceleration of the projectile after a time Δt? I know that I need to use Newton's law of gravitation, however I...

OK, I was thinking about transformers and mutual induction and then drifted onto displacement current. I then decided to build a simple test apparatus and test for the magnetic field between two parallel plates. using a variety of coil designs to have as much of the windings perpendicular to the...

http://community.accelrys.com/servlet/JiveServlet/showImage/2-14223-12512/%E5%9B%BE%E7%89%871.png I want to assign displacement to the top edge of the above model in Material Studio. How to realize it ? Thank you !

Homework Statement A catapult (slingshot) is used to fire a ball of mass 0.2kg vertically into the air. The elastic is stretched so that there is a tension of 40N in both 'sides' of the slingshot, ie on the elastic on either side of the mass (I am trying to describe a diagram here, so...

Velocity, displacement and position time graph help! cyclist road east for 1.0x10^2 m with a constant velocity of 25 m/s she then accelerates down a hill and 5s later reached the bottom of the hill with a velocity of 50m/s a) how long did the cyclist ride before reaching the hill? B)what is...

Is it valid to subtract a position vector of direction E with one of direction W or do they both have to have the same dierction when using the net displacement formula?

Homework Statement A small body is undergoing simple harmonic motion on a frictionless horizontal surface with an amplitude of 0.13m. At a point 0.05 m from equilibrium the velocity is 0.24 m/s. a.) what is the period? What is the displacement and acceleration when the velocity is ±0.10 m/s...

Homework Statement How would you find the displacement of a velocity/time graph when it is in the shape of a parabola? Homework Equations I know Velocity x time = displacement. The Attempt at a Solution I know that velocity x time = displacement, but how do you find the area under...

Homework Statement A clock is showing 3.30. Calculate the angular displacement in degrees from the 12.00 position of the clock to: i the minute hand ii the hour hand I got my minute answer as 180 degree, which is right. But my second answer was 90 degrees, which apparently is wrong! the...

Homework Statement After three days of hiking, a group of hikers are 30km N from their starting position. On the first day, they hiked 20km E. On the second day, they hiked 30km 53 degrees N of W, calculate their displacement on the third day. Homework Equations I haven't a single clue...

Homework Statement You walk to the corner store after school to buy a carton of milk before going home. The store is 750 m south of the schoo, and your house is 625 m north of the school. What is your net displacement. Homework Equations dT=d1+d2 formula for displacement The...

Hi everyone! Anyone knows what is the maximum displacement covered by a body in a time equal to half of its time period? Please also give an example. Thank you.

Homework Statement An object starts at rest and accelerates at 2.5 m/s^2 for 12 seconds. It then moves at a constant velocity for 5.0 seconds and then slows down uniformly at 1.5 m/s^2 until it stops. Calculate: a) the constant velocity b) the time taken for deceleration c) the total...

i'm having trouble finding good references for lithiating a terminal alkyne and reacting that acetylide with a tosylate, and my goto procedure didn't work. can anyone give me a hand? procedure i did try: alkyne in THF at -78 1.0 eq nBuLi added 1.0 eq tosylated phenylethanol added (color...

Homework Statement What is the total displacement of the graph? (see the picture) The answer is 14m. Can you please show me how to do it? Thank you for your help! :D

I luckily went on to Newton's laws which I already know. I was stuck with a fantastic question ( I have been seeing the Newton's laws from my childhood, but I didn't notice these sort of observation ) . I was seeing the Force and Momentum. Force is based upon acceleration and Momentum on...

Homework Statement An angular displacement θ radians in time t seconds is given by the equation θ = sin 3t. Find a:) angular velocity when t = 1 second b:) the smallest positive value of t for which the angular velocity is 2rad/s c:) the angular acceleration when t = 0.5 seconds d:) the...

My book says that the total vector displacement around a closed loop is zero. Is this a general thing for every type of closed loop? If so, should this be obvious?

Homework Statement Consider an elastic string of length L whose ends are held fixed. The string is set in motion with no initial velocity from an initial position u(x, 0) = f (x). Assume that the parameter alpha = 1. Find the displacement u(x,t) for the given initial position f(x) The Attempt...

Homework Statement A car is driven east for a distance of 48 km, then north for 25 km, and then in a direction 33° east of north for 29 km. Determine (a) the magnitude (in km) of the car's total displacement from its starting point and (b) the angle (from east) of the car's total...

Homework Statement A light ray is incident on a flat piece of glass with index of refraction n. Show that if the incident angle θ is small, the emerging ray is displaced a distance d = tθ(n - 1)/n form the incident ray, where t is the thickness of the glass and θ is in radians. Homework...

I want to show that the energy displacement of Z^{2n}(r), the 2n-dimensional cylinder with radial radius is at most \pi r^2. In the textbook of Mcduff and Salamon they write that I should identify the two dimensional ball (with radius r) with a square of the same area, and then calculate...

Homework Statement A1. An object undergoing circular motion is pictured below at time t = 0 s. (a) What is the angular frequency of the object? (b) What is the equation of the displacement of the object in the x-direction? (c) What is the equation of the displacement of the object in the...

Now it's known that waves can't cause the displacement of an object but i made a few experiments that proves it can. For example , wind can cause a wave the can move a piece of paper. However, a water wave can't cause the displacement of and object but other waves like wind can cause that waves...

Hi, I've taken introductory calculus and am doing algebra based physics, but I'm trying to understand how to relate calculus to physics. This is more of a theoretical question than a practical one, so I might be rambling on about something that doesn't even work. I know that W=∫F(d)Δd, but...