Displacement Definition and 999 Threads

Homework Statement I have tried to solve the displacement sideways of an lightray through a medium with snells law. The question is how much does the ray travel in x-direction in the new medium with width D. It says in the text that one should use pytagoras but I can't seem to understand...

A fan rotating at 2.1 radian/s slows down with a constant acceleration and comes to a stop in a time of 4.7 s. What is its angular displacement in this time? Is this what I'm supposed to use: Δθ = Δθ2 − Δθ1? if it is I'm not sure how to begin to solve this problem, if anyone could help me...

hello, what would be the displacement of cfm when the wind is moving at 5km/h through a cylinder 10ft in diameter by 50 feet long. Thanks!

Homework Statement A small map shows Atlanta to be 730 miles in a direction of 5 degrees north of east from Dallas. The same map shows that Chicago is 560 miles in a direction of 21 degrees west of north from Atlanta. Assume a flat Eath and use this information to find the displacement from...

Homework Statement Basically they want me to find the displacement for the entire time interval on this graph. The graph is in the attachment. Homework Equations Displacement is equal to the area under the graph. In this case d=LxW+(BxH)/2+(BxH)/2 The Attempt at a Solution My...

1. An Arrow is aimed horizontally at a bulls-eye 15 m away. If the initial veoicity of the arrow is 128 km/hr, how far below the bulls-eye will the arrow strike? A) 2.1 cm B)12 C)42 cm D)87 cm 2. Homework Equations : x=a*t or t=x/a y=1/2g*[t][/2] 3. So first, we convert 15 m...

Homework Statement Show the acceleration and velocity on the graph: x(t) = (at)i + (bt^2)j (I have done the differentiation, but I need to show them physically on the graph) a and b are positive constants Homework Equations x(t) = (at)i + (bt^2)j The Attempt at a Solution...

Homework Statement The object of this assignment is to find two engines that have the same displacement and different number of cylinders and compare ratio of their power output to a few equations' results. The engines should be from the same manufacturer and their manufacturing date should...

Homework Statement A boxcar of length 7.8 m and height 2.3 m is at rest on frictionless rails. Inside the boxcar (whose mass when empty is 2900 kg) a tank containing 1400 kg of water is located at the left end. The tank is 1 m long and 2.3 m tall. At some point the walls of the tank...

Homework Statement http://i287.photobucket.com/albums/ll124… Homework Equations At the end of the walk, what is the magnitude of the person’s resultant displacement measured from the starting point? I found this answer to be 595.7697375 m after finding the vertical velocity to be...

how displacement and velocity can be negative.

Homework Statement A car accelerates uniformly from rest. If the acceleration was 2.50 m/s^2 west, what was its displacement when it reached a velocity of 20.0 m/s west? Homework Equations The Attempt at a Solution A= 2.50 m/s^2 west Vi= 0 m/s Vf= 20 m/s west vf=vi+at 20m/s=2.50m/s^2(t)...

Homework Statement What is the displacement between 15 and 20 seconds? At 15 seconds the position is 51 meters and at 20 seconds the position is 60 meters. It is a constant velocity between 15 and 20 seconds. The answer is 9 meters but I have no idea how my teacher came to that. Thanks...

Homework Statement A movie set requires a stunt man to jump across a 40m wide river on a motorcycle. The takeoff ramp on one bank of the river is inclined at 53(degrees) above the horizontal and is 100m above the level of the river. If the bank on the far side is 15 m below the top of the...

Homework Statement The only force acting on a 2.3 kg body as it moves along the positive x-axis has an x component Fx = -3x N, where x is in meters. The velocity of the body at x = 2.8 m is 11 m/s. (a) What is the velocity of the body at x = 3.6 m? (b) At what positive value of x will the...

Hello I am trying to design a force balance lever system. Basically the initial state will in a force balance equilibrium. That is, there will be a mass m placed onto of the capacitor plate to keep the lever balanced. I will then ramp the voltage of the capacitor up, causing a force of...

HI all, I have been trying to calculate the displacement of an electron when subjected electric and magnetic field, please see the pic below: I anticipate that the electron will form an ellipse shape. Basically I would like to know how to calculate the major and minor axis of the ellipse...

HINT: SUB in (x=hv/k(b)T) I don't understand How I am supposed to approach this question or how I am supposed to verify it

Hello, Please help me solving this. Q1-If you move 10 km North, 10 km East, and 10 km South, a. What is your displacement? [ can not calculate it ] b.What is the total distance you traveled? [30 km ] 2. The below graph represents the position of a mouse at a given time...

Homework Statement While exploring a cave, a spelunker starts at the entrance and moves the following distances. She goes 75 m north, 250 m east, 100 m at an angle 30° north of east, and 160 m south. Find the resultant displacement from the cave entrance. Homework Equations The...

A glider on an air track moves in the +X direction with a constant acceleration.? It has two flags, each exact? A glider on an air track moves in the +X direction with a constant acceleration.? It has two flags, each exactly 25.4 mm long, with the midpoints of the flags separated by 162 mm...

Homework Statement A radar station detects an aircraft (moving east to west) at 1200ft at 40degrees. 12 seconds later the plane is 2080 ft from the station and has advanced 123degrees find His displacement His average Velocity Homework Equations Dx=dx1 + dx2 Dy=dy1 + dy2 The...

Homework Statement Two students are traveling along a straight line path. One at .9m/s, the other at 1.9 m/s. How far does the faster student travel in order to arrive at the destination in 5.5 min. Homework Equations I was using x=Vx X t for each students path and subtracting the...

Homework Statement A grasshopper makes four jumps. The displacement vectors are (1) 24.0 cm, due west; (2) 23.0 cm, 31.0 degrees south of west; (3) 23.0 cm, 33.0 degrees south of east; and (4) 34.0 cm, 46.0 degrees north of east. Find (a) the magnitude and (b) direction of the resultant...

Homework Statement a man walks 600m [E47 degree N] then 500m [N38 degree W] then 300m [W29degree S] and finnally 400m [S13degree E] Homework Equations find this resultant displacement. The Attempt at a Solution my problem is .. [E47 degree N] ... does that mean i must put the...

Homework Statement DISPLACEMENT VECTORS Homework Equations r=xi+yj+zk=<x,y,z> The Attempt at a Solution For all of the problems I am starting to do class we must use the equation above. I do not understand why we use i,j,k and how they are similar to x,y,z and how to use...

Homework Statement Route follewed by hiker consists of displacement vectors A, B, C. Vector A is 1550 m long in a direction 25.0 N of E. Vector B is of unknown length but in a direction of 41.0 E of S. Vector C is also of unknown length but of direction 35.0 N of W. Hiker ends up where he...

Ok, so I am having a difficult time with vectors (despite the fact that it appears to be an easy concept). My main issue is I am so focused on my AP Calc and AP English classes that I have not had much time for any studying, so I rely on what I hear during the course. I am required to complete...

A rocket takes off vertically from the launchpad with no initial velocity but a constant upward acceleration of 2.25 m/s2. At 15.4 s after blastoff, the engines fail completely so the only force on the rocket from then on is the pull of gravity. (a) What is the maximum height the rocket will...

Homework Statement Starting from one oasis, a camel walks 82.021 ft in a direction 30 degrees south of west and then walks 30 km toward the north to a second oasis. Without using a coordinate system, calculate the magnitude and the direction of the displacement from the first oasis to the...

Homework Statement Heather and Matthew walk with an average velocity of 0.98m/s eastward. If it takes them 34 min to walk to the store, what is their displacement? Homework Equations V avg = Δx/Δt (since I'm looking for the displacement I changed it to) Δx=V avgΔtThe Attempt at a Solution...

I got this problem that states: A boy runs 11.3 blocks North, 5.6 blocks Northeast, and 4.7 blocks West. Determine the length of the displacement vector that goes from the starting point to his final position. I got the answer to this part. It was 15.25979798 blocks. Here is the next...

Sorry, meant to put this in the homework forum.

Homework Statement car travels 18.2km due north then 43.2km at 53 degrees west of north. Find magnitude of car's resultant displacement. b.) calculate the direction of the car's resultant displacement, measured counter-clockwise from the northerly direction.Homework Equations The Attempt at a...

Hey guys I'm lost with this word problem. A roller coaster moves 85m horizontally, then travels 45m at an angel of 30.0° above the horizontal. What is its displacement from its starting point? I started out by drawing a 85m line. But now I'm confused because I have to set a 30 degree angle...

Homework Statement In order to get from her classroom too the lab without going through the crowded rotunda, Jodie walks 14m (E), 42m(S), 32m(W), 13m(S), and 9m(E). Draw a scale diagram to represent all the initial displacement vector and the resultant displacement vector in Jodie's walk to...

Homework Statement A truck travels 3.45 km north and then makes a 90° left turn and drives another 4.10 km. The whole trip takes 4.50 min. 1)With respect to a two-dimensional coordinate system on the surface of Earth such that the y-axis points north, what is the net displacement vector of the...

Homework Statement A car is driven east for a distance of 48 km, then north for 25 km, and then in a direction 25° east of north for 28 km. Draw the vector diagram and determine the total displacement of the car from its starting point. whats the magnitude and direction(counterclockwise...

So I have the problem: A particle of mass m is at rest at t=0. A linearly increasing force F=bt is applied. Find the velocity and displacement of the particle at t=t1>0 What exactly is bt? Can it be set equal to ma?

A girl travels 5 blocks west, 4 blocks north, then 7 blocks east. It asked to solve for the magnitude of her displacement and I got 4.472135955 blocks, which was correct. The next part of the problem however asks to "Find the direction (measured from due east, with counterclockwise positive) of...

So I've been stuck on this problem for hours, I just can't seem to put the pieces together... Homework Statement Two basketball players of equal height, (and jumping with same initial velocity, etc.) by jumping they raise their centers of mass the same distance "H". The first player (A)...

pressure=p(x,t)=BkAsin(kx-ωt) http://www.physics.unomaha.edu/Sowell/phys2120/Lectures/Sound/Sound.pdf Surely, when loudness-intensity-pressure increases, so does the maximum displacement A of the speaker. Wrong thread title. My question is: Why increasing the maximum molecule...

hellow, i need you to help me with this, i need the relation between presion wave and displacement wave into an air column, i know that when you talk about presion wave, its because the wave needs a physics medium to move, but i don't know how is this in an air column, thank you.-

Homework Statement In a frictionless plane, a block of mass M is attached to a spring initially relaxed of constant k which is attached to a wall. A piece of gum of mass m is then horizontally thrown in direction to the block with velocity v_1 hitting it at time t = 0 in a perfectly inelastic...

1.A superhero flies 340 m from the top of a tall building at an angle of 22 ◦ below the horizontal. What is the horizontal component of the superhero’s displacement? Answer in units of m. What is the vertical component of the super- hero’s displacement? Answer in units of m. 2...

Homework Statement A 0.24 kg mass is suspended on a spring which stretches a distance of 5.9 cm. The mass is then pulled down an additional distance of 13.5 cm and released. What is the displacement from the equilibrium position with the mass attached (in cm) after 0.46 s? Take up to be...

I'm trying to design a position sensor for a specific application but the last time I thought about physics was a long time ago. The situation is *similar* to this : I have a block of wood with an irregularly shaped tantalum bead (diameter of about 2mm) embedded about 2-4 mm into the wood...

An air traffic controller observes two airplanes approaching the airport. The displacement from the control tower to plane 1 is given by vector A, which has the magnitude 220km and points in a direction 32(degrees) north of west. The displacement from the control tower to plane 2 is given by...

URGENT HELP needed on Displacement Angles Due tomorrow Edit: with the help of second poster, I was able to solve it out. Btw I got 15 meters west and 11.34 meters south for the second one

Homework Statement At time t = 0 a drag racer starts from rest at the origin and moves along a straight line with velocity given by v = 5t^2, where v is in m/s and t in s. The expression for the displacement of the car from t = 0 to time t is (a) 5t^3 (b) 5t^3/3 (c) 10t (d) 15t^2 (e) 5t/2...