Magnitude Definition and 1000 Threads

[b]1. There is a 45 kg block that is connected to a 30 kg block by a mass-less rope. The surface is frictionless. A force of F=200 N pulls the blocks to the right and in the positive direction. What is the magnitude of the tension T in the rope that connects the two blocks? [b]2. I am not...

Two vectors A and B have magnitudes A=16 and B=12 units respectively. A. Find the magnitude of the sum A+B if the angle between the two vectors is 120 degrees. B. find the angle between the two vectors if the difference A-B has magnitude of 16 units. Could someone please do a step by...

[b]1. A ball is dropeed from a height of 2.5m and rebounds to a height of 2.1m. If the ball is in contact with the floor for .70ms determine 1: direction and 2: the magnitude of the balls average acceleration due to the floor I know the equation for average acceleration = change in...

Homework Statement 1. Homework Statement A 373-kg boat is sailing 13.0 ° north of east at a speed of 2.00 m/s. 32.0 s later, it is sailing 33.0 ° north of east at a speed of 3.90 m/s. During this time, three forces act on the boat: a 33.1-N force directed 13.0 ° north of east (due to an...

A particle undergoes three displacements. The first has a magnitude of 15m and makes and angle of 35 degrees with the positive x axis. The second has a magnitude of 7m and makes an angle of 163 degrees with the positive x-axis. After the third displacement the particle returns to its initial...

Homework Statement A force of magnitude 7.50N pushes three boxes with masses m1=1.3kg, m2=3.2kg, and m3= 4.9kg as shown in the figure. I want to find the magnitude of the contact forces between boxes 1 and 2, and between boxes 2, and 3. Now, the force, 7.5N is being pushed from right to...

Homework Statement Forces of 10 N north and 20 N east are simultaneously applied to a 10-kg object as it rests on a frictionless horizontal table. What is the magnitude of the object's acceleration? Homework Equations a = \frac {F_{net}}{m} The Attempt at a Solution a_{north} = \frac...

i have a question on vector. does the angle of a vector influence its magnitude? so if a vector is moved from 30 degrees to 60 degrees does its magnitude change as well ? any help will be appreciated.

A cannon sends a projectile towards a target a distance 1210 m away. The initial velocity makes an angle 26o with the horizontal. The target is hit. The acceleration of gravity is 9.8 m/s2 . What is the magnitude of the initial velocity? Answer in units of m/s y = viy•t +0.5•ay•t2 vix =...

Homework Statement Can vectors with 180+(degrees) have a negative magnitude? I'm trying to find components of a vector that is going 260 km, 48 (degrees) south of east. So I'm confused whether the 260 is positive or not because of the -48 degrees.Homework Equations (\vec{V}) (sin\theta)...

Homework Statement Orv walks 312 m due east. He then continues walking along a straight line, but in a different direction, and stops 220 m northeast of his starting point. How far did he walk during the second portion of the trip and in what direction? What is the magnitude? What is the...

Homework Statement Two horses pull horizontally on ropes attached to a tree stump. Each horse pulls with a force of magnitude F. If the resultant force (vector R) has the magnitude R = 1.51 F, what is the angle (in degrees) between the two ropes? Homework Equations The Attempt at...

Homework Statement The drawing (not to scale) shows one alignment of the sun, earth, and moon. The gravitational force that the sun exerts on the moon is perpendicular to the force that the Earth exerts on the moon. The masses are: mass of sun=1.99 × 1030 kg, mass of earth=5.98 × 1024 kg...

Hi, I need some help Homework Statement Three kids are pulling on a poor teddy bear. Andy is pulling with a force of 10N in the North direction. Ben is pulling with %N straight South, and Charlie is pulling with 8N in the West direction a) which direction will they move b) In what direction...

Hey guys I'm sort of new to this forum, but I heard it was good so I thought i'd post a few questions hereHomework Statement The first question I have is not really a problem, but more of a question on the problem itself. I have two 3d vectors which are then subtracted to form a 3d vector in...

astronomy - conceptual, trigonometric parallax Homework Statement To determine a star's trigonometric parallax, we need at least 3 measurements of its position relative to much more distanct objects. Explain why this is true. (What else could change its position on the sky?) Homework...

Homework Statement find the magnitude and the angle that it makes with the positive x-axis? http://imageshack.us/photo/my-images/594/unledzmo.png/ Homework Equations The Attempt at a Solution The answer that I have is F= 179.37 at an angle of 91 degrees. Am I right? I took F1...

I have been thaught that the magintude of the current generated by photons fired at a metal is unrelated to the frequency of the photons but to the photon beam's srength (photons/sec). I know from the governing equation: E_{\gamma}=\phi+E_{k_{e^{-}}} that the frequency of the photons...

Homework Statement Suppose vector C = vector A + vector B where vector A has components vector A x = 4, vector A y = 2 and vector B has components vector B x = -3, vector B y = -5. (a) What are the x- and y- components of vector C ? I've solved this to figure out that x = 1 and y = -3 for C...

Homework Statement Consider three charges arranged as shown. + + - 1 2 3 What is the magnitude of the electric field strength at a point 1.5 cm to the left of the middle charge? The value of the Coulomb constant is 8.98755 × 10^9N
m2/C2. Answer in units of N/C q1=8.2 µC= 8.2*10^-6...

A 49.0-g Super Ball traveling at 27.0 m/s bounces off a brick wall and rebounds at 19.0 m/s. A high-speed camera records this event. If the ball is in contact with the wall for 3.65 ms, what is the magnitude of the average acceleration of the ball during this time interval? I converted 3.65...

Homework Statement A basketball player runs down the court, following the path indicated by the vectors A,B, and C in the figure. The magnitudes of these three vectors are 10, 20 and 7 m . Assume the positive x-axis is directed to the right. There is a 45degree angle outside of where A...

Homework Statement Three vectors are shown in the figure (A = 68.0 ; qB = 54.0°). Their magnitudes are given in arbitrary units. What is the magnitude of the resultant vector? Homework Equations here's the image that goes with it The Attempt at a Solution well i figure the angle...

Homework Statement Determine the magnitude of the electric field at a point midway between a -8.1μC and a 8.9μC charge 8.0cm apart. Assume no other charges are nearby. Determine the direction. (Answer in two sig figs.) Homework Equations E=k/r^2(Q1+Q2) The Attempt at a Solution I drew...

In the figure, the net electrostatic force on Q1 is zero. If Q1 = +4.99 nC, determine the magnitude of Qo. Qo = (r0/r1)^2 * abs(q)*2cos theta The figure is attached, please help, I'm so lost with physics II

A woman walks 143m in the direction 55° east of north, then 178m directly east. Find the magnitude of the displacement vector. Answer: 306m Relevant equations: I will use vA as a shorthand to represent vector A and ||vA|| to represent the magnitude. Ax = ||vA||cos(theta) Ay =...

Vector A has a magnitude of 14.0m and is angled 38.0 degrees counterclockwise from the +x direction. Vector C has a magnitude of 13.2m and is angled at 22.4 degrees counterclockwise to the -x direction. If vector A + vector B = vector C what is (a) the magnitude (b) and angle - relative to +x...

1. Vectors A and B both have a magnitude of 3.0 meters. Find the magnitude and direction of: a) A+B b) B-A c) A-2B 2. additional info... the problem comes with a picture of a the vectors. It shows the x and y axis. Vector B is going directly along the positive y axis. vector A is...

Hey People just a general question Is the following necessarily possible? |z23|=|z|23 Where z is a complex number. I can't think of a reason why not but then again complex numbers have some subtle behaviours. Thanks

Homework Statement a force is given by F= 20i - 60j + 90k N. Find its magnitude and the angles it forms with the coordinate axis. Homework Equations F = magnitude of F times the unit vector magnitude is square root (Fx squared + Fy squared + Fz squared) and the unit vector can be...

Homework Statement A vector of magnitude 20 is added to a vector of magnitude 25. What could the magnitude of the sum be? Homework Equations The Attempt at a Solution I am given a list of choices. But, it seems to me like it could be just about anything, because I have no idea...

Homework Statement Compute the magnitude and location of the resultant of the parabolic loading shown in the figure below. The slope of the parabola is zero at the origin. See figure: http://imageshack.us/photo/my-images/819/prob6.jpg/ Homework Equations The Attempt at a...

Homework Statement I attached the drawing. The force of magnitude F acts along the edge of the triangular plate. Determine the moment of F about point O. Homework Equations M=rxF The Attempt at a Solution What I did was I just picked the top left point of the triangle and labeled...

Homework Statement Three charges are arranged as shown in the picture I attached. Find the magnitude and direction of the electrostatic force on the charge at the origin.Homework Equations I know that Coulomb's Law must be applied.The Attempt at a Solution I've drawn a force diagram with FCB...

Homework Statement Two small metallic spheres, each of mass 0.20 g, are suspended as pendulums by light strings from a common point as shown in the figure I attached. The spheres are given the same electric charge, and it is found that they come to equilibrium when each string is at an angle...

Hi there. So, I was wondering if there is anyway to tell what the perceived magnitude of today's earthquake is, based on my distance from the epicenter. I live around Princeton, so I was about 250 miles north of the epicenter. I was thinking that there might be an equation that describes how...

Homework Statement Three point charges are arranged as shown in the figure below. (Take q1 = 5.70 nC, q2 = 4.60 nC, and q3 = -2.79 nC.) (a) Find the magnitude of the electric force on the particle at the origin. (b) Find the direction of the electric force on the particle at the...

Hi, I need to calculate the magnitude of the initial velocity of the following data for projectile motion. Any help would be greatly appreciated as I have no idea where to start! Thanks please see the question here: http://i52.tinypic.com/15p0kza.png and the data here...

Hi, I need to calculate the magnitude of the initial velocity of the following data for projectile motion. Any help would be greatly appreciated as I have no idea where to start! Thanks please see the question here: http://i52.tinypic.com/15p0kza.png and the data here...

If mass 1 is 5 kg, and mass 2 is 3 kg, what is the magnitude of tension in the string supporting the pulley, T1? The answer is 74 N. What I presume they did was to find tension in the string and then double that to get ~74 Newtons. My question is: why isn't T1 simply the weight of the...

Homework Statement A small loop of wire of radius 1.5 cm is placed at the center of a wire loop with radius 20 cm. The planes of the loops are perpendicular to each other, and a 5.0 -A current flows in each. Estimate the magnitude of the torque the large loop exerts on the smaller one...

Homework Statement A rectangular loop wire is placed next to a straight wire, as shown in the figure. There is a current of 3.5 A in both wire. Figure: http://www.flickr.com/photos/65980314@N06/6020832477/ Homework Equations F = ((mu(0)*I1*I2) / (2*pi*r)) * L force in terms of...

Homework Statement Find the magnitude of the electric field intensity at a distance 0.15m from the axis of a long, straight conductor, which has radius 0.03m, and a charge density of 4.0 C/m. Homework Equations Eflux = E.A Eflux = q/e0 q = sigma*h The Attempt at a Solution...

Homework Statement The nucleus of a Tl atom (Atomic mass = 203, element #81) has a magnetic moment of 1.611 µn. A magnetic field is applied to it and its NMR frequency determined to be 3.90 MHz. What is the magnitude of the magnetic field? Homework Equations torque = magnetic moment x...

Homework Statement A square loop, with sides of length L, carries current i. Find the magnitude of the magnetic field from the loop at the center of the loop, as a function of i and L. (Use any variable or symbol stated above along with the following as necessary: μ0.) Homework Equations...

Homework Statement In wandering, a grizzly bear makes a displacement of 1563m due west, followed by a displacement of 3348m in a direction 32 degrees NW. What are the (a) the magnitude and (b) the direction of the displacement needed for the bear to return to its starting point? Specify the...

Homework Statement A coil of wire consisting of 40 rectangular loops, with width 16 cm and height 30 cm, is placed in a constant magnetic field given by B = 0.055Tx + 0.210T.z The coil is hinged to a fixed thin rod along the y-axis (along segment da in the figure) and is originally located in...

Homework Statement Consider the acceleration of a particle along a straight line with an initial position of 0 m and an initial velocity of 0 m/s. 1) Calculate the magnitude of the displacement after the car travels the first 5 s. Answer in units of m. 2) How far does the car...

Homework Statement I made those illustrations up. :) We are asked to find the angle theta using the graphical method (Tail-to-Tip Method) From these examples, Vector A + Vector B + Vector C = Resultant Vector How to find angle theta of Resultant Vector? Homework Equations The Attempt...

Homework Statement If Q = 80 nC, a = 3.0 m, and b = 4.0 m in the figure, what is the magnitude of the electric field at point P? http://img19.imageshack.us/img19/1596/picat.jpg Homework Equations \vec{E} = k_e \frac{|q|}{r^2} \left\{\begin{matrix}\vec{E}_x=k_e...