Resultant Definition and 505 Threads

Homework Statement Two harmonic waves are described by (pic attached). What is the phase of the resultant wave when x = t = 0? A. 3 B. 1 C. 4 D. 2 Homework Equations y=Asin(kx-\omega(t)+\phi) (Single wave equation) y=2Asin(kx)cos(\omega(t)) (Standing wave equation) The...

anyone can help me out? I've tried but my answer and answer key are differnet! Homework Statement three point charges lie on a straight line. find the resultant force exerted on (a) the -2\muC charge, (b) the 5 \muC charge 1 (5\muC) 2(-2\muC) 3(3 \muC) distance...

Homework Statement Determine the height h above the base B at which the resultant of the three forces acts. Homework Equations Rx=F1,x + F2,x + F3,x The Attempt at a Solution Rx=(-300)+650+(-250) Rx=100 but where?! The picture shows the diameter decreasing a tad just under the 650 force...

Hey, guys! I just started my senior high school physics and calculus courses. So far all we have done is the basics of vectors. I can find the resultant displacement of 2-3 vector problems fairly easily. My physics teacher told us to try and make up our own questions, to see if we could do them...

Homework Statement A car travels 20 km due north and then 35 km in a direction 60 degree west of north. Find the magnitude and direction of the car's resultant displacement. Homework Equations R = sqrt(A^2 + B^2) Ax = cosA, Ay = sinA tan = y/x The Attempt at a Solution This...

Homework Statement See attachement. Homework Equations The Attempt at a Solution I would be able to solve it if I could somehow find \phi to describe the angle of F3 relative to the positive x axis. Can anyone see how to solve that specific angle? Then and can simply sum as...

Homework Statement Two wave generators S1 and S2 produce water waves of wavelength 0.5 m. A detector X is placed on the water surface 3 m from S1 and 2 m from S2 as shown in the diagram. Each generator produced a wave of amplitude A at X when operated alone. The generator are operating...

Help please on vector. I have scanned my answer and question. Thanks

1. If the resultant force acting on the hook is FR = <-180, 810, 180> what is the magnitude of F? 2. So basically i got F1 which is <240,416,-360> and subtracted this from FR and got vector F2 then i took the square of the components and square rooted getting 789lb. Why is this wrong...

[b]1. Two forces of magnitude 25 pounds and 40 pounds act on an object. The force of 40lb acts along the positive x-axis, and the force of 25lb acts at an angle of 80 degrees with the positive x-axis. Find the direction and magnitude of the resultant force. Round the direction and magnitude...

Homework Statement The coefficient of kinetic friction between a 20kg box and the floor is 0.40 -> How much work does a pulling force applied 37 degrees above the horizontal do on the box in pulling it 8.0m across the floor at constant speed Homework Equations F(kinetic)= F(normal) x...

Homework Statement Three light waves combine at a point where their electric field components are E1 = Eo sin \omegat E2 = Eo sin (\omegat - 2\pi/3) E3 = Eo sin (\omegat + \pi/3) Find the resultant amplitude of the electric field ER at that point and it's phase angle\beta Write...

Homework Statement I need help with this homework problem. 1st vector: 80 N & 180 degree 2nd vector: 40 N & 145 degree 3rd vector: 50 N & -50 degree And I need to find the resultant and the Eq. Where do I start and how do I do it please include answer as I'm confuse and I have a quiz...

Is a.) correct? Great help is required in the other two. Homework Statement a.) Fine salt is deposited from a negligible height at a rate of 12kgs-1 onto a conveyor belt moving at speed 8.0ms-1.Calculate the force required to keep the belt moving at this velocity. b.) A small aircraft of...

Figure below shows a length of wire with a central arc, placed in a uniform magnetic field B that points out of the plane of the figure. If the wire carries a current i, what resultant magnetic force F acts on it? Express the answer in terms of B, L, R and i. I am stuck in this question for...

Hello again :). here is a very interesting exercise, I attached a picture of the exercise, its a Circle with Forces. Homework Statement Compute the Magnitude and Direction of the Resultant Couple acting on the body Shown: Homework Equations M=F x D The Attempt at a SolutionCan you provide...

Hi, I am having a little problem understanding this exercise, need some route to follow. I attached a picture of the exercise. - The Problem Statement -Determine the Resultant of the Force System. - Relevant Equations M= FxD R=\SigmaF= X(bar)= \SigmaFXD/R= -I tried...

Find the forces...if given resultant. the problem is in the link below... http://i44.photobucket.com/albums/f46/maximus11373/353.jpg i fully understand how to find the resultant when given the forces but do not know how to find the forces when given the resultant. my question...

Homework Statement Determine the amplitude of the resultant wave when two sinusoidal waves having the same frequency and traveling in the same direction are combined, if their amplitudes are 3.0 cm and 4.0 cm and they differ in phase by \pi/2 rad Homework Equations y(x,t)=a*sin(kx-wt)...

Hi, I need some guidance regarding this exercise, I attached a visual representation of the exercise Homework Statement Find the Resultant Force for the following system of forces shown FORCES SHOWN on a Vector: F1= 5 kips on the X quadrant in a 60 degree angle F2= 5 kips...

Forces of 67.2lb and 57.3lb are exerted at an angle of 47 degrees. What is their resultant?

Use the cosine and sine rules to determine the magnitude and direction of the resultant of a force of 11 kN acting at an angle of 50 degrees to the horizontal and a force of 6 kN acting at an angle of -30 degrees to the horizontal. helppp please

Homework Statement An object is at the origin. They're four perpendicular forces acting upon it. In the negative x axis, 18 N. positive x axis, 10 N. negative y axis, 8 N. and positive y-axis 15 N. calculate the resultant force. What angle is it at? Homework Equations F=Ma? The...

Homework Statement To waves with the same frequency interfere. The intensity of the two waves are I1 and I2. Show that the resultant intensity is: I = I1 +I2 + 2*sqrt(I1*I2)*cos(δ) Where δ is the phase difference between the two waves. Hint: Use the relation between intensity and...

Please help me, "Determine the Magnitude & Location of the Resultant for... Hi, I need some help understanding how to do this type of problem, I attached a digital picture version of the problem.Homework Statement Determine the Magnitude and Location of the Resultant for the Load System...

Hi, I got this problem that I have no idea how to begin, can yo help me please. Calculate the magnitude, direction and sense of the resultant force of the noncurrent force system shown, determine where the resultant intersects the bottom of the shape with respect to Point ADamn I wish I could...

Finding the Resultant of two tensile forces? I'm having problems finding the resultant of these two forces both analytically and graphically. I've mad a start but I'm pretty lost. Is this all correct? http://i45.photobucket.com/albums/f98/pastilles/q1-3.jpg I've managed to complete...

Homework Statement a girl delivering newspaper covers her route by traveling 4 blocks west, 2 blocks north, the 9 blocks east. what is her resultant displacement? Homework Equations do i even begin at solving this? The Attempt at a Solution i have no idea how to do this

Homework Statement Two forces, 370 N at 11◦ and 293 N at 34◦ are applied to a car in an effort to accelerate it. 3765 kg 370 N 11◦ 293 N 34◦ What is the magnitude of the resultant of these two forces? Answer in units of N Homework Equations The Attempt at a...

So this first question http://tinypic.com/view.php?pic=2qls4s4&s=4 I figured out F1 X,Y,Z but for F2 I cannot seem to figure it out at all, it seems impossible. I can only figure out the Y axis but not the X and Z, any ideas?

Homework Statement A man pushes a mop across the floor causes the mop to undergo two displacements. The first has a magnitude of 235cm and makes an angle of 131⁰ with the positive x-axis. The resultant displacement has a magnitude of 215cm and is directed at an angle of 49⁰ to the positive...

Homework Statement Particle A with a charge of 45 micro Coulombs is located on the x-axis at a point -11 cm from the origin. Particle B with a charge of 41 micro Coulombs is located on the y-axis at a point +68 cm from the origin. What is the magnitude of the electrostatic force that Particle...

Homework Statement Homework Equations kq1q1/r^2 k being 8.98755 x 10^9 The Attempt at a Solution I found the 3 forces between the 3 charges using the above equation. I split up the forces into x and y compnents. Added the sum of the y's and the x's. Used Pythagorean theorem...

Can someone please tell me how to find the stress resultant of a section of a cantilevered beam as shown in dia. below? The dashed x, y line is showing the centroid (if that makes a difference for this question) I know how to find the bending moments and sheer stress, but I am not sure what...

Homework Statement Figure shows cross sections of three hollow objects two of which have openings closed with a soft rubber membrane R ,and the other without an opening just floating inside three bottles of water labelled A,B and C.(sorry I've missed the labels in the diagram.A,B and C are the...

If i hit a gear/wheel with a certain force how do i calculate how the resultent rpm? Theres a picture attached to help with my explanation. thanks, Tom

Homework Statement An airliner is flying in the direction North 20 degrees East with an airspeed of 300mph. Its ground speed and true course are 350mph and 30 degrees respectively(RESULTANT). Use a vector analysis to determine the direction and speed of the wind. Include a diagram.Homework...

Homework Statement A conical flask contains a liquid of density \rho to a height 'h'. If the area of the base of the flask is A and V is the volume of the liquid in the flask,then the resultant force acting on the curved surface is, 1) h\rhogA - V\rhog horizontally 2) h\rhogA - V\rhog...

Homework Statement The steel plate shown supports six 2 in. - diameter idler rollers mounted on the plate as shown. Two flat belts pass around the rollers, and rollers A and D are adjusted so that the tension in each belt is 10 lb. Determine (a) the resultant couple acting on the plate is a...

Homework Statement A vertical sluice gate is 5 meters wide and 3 meters deep. calculate the resultant thrust and overturnning moment when the water is level with the top edge of the gate. Density water = 1000kg/m^3 Homework Equations Newton's First Law F = ma Moment = Force x...

Homework Statement While exploring a cave, a spelunker starts at the entrance and moves the following distances: 75.0 m north, 295 m east, 190 m at an angle 30.0° north of east, and 150 m south. Find the resultant displacement from the cave entrance.

Three forces are applied to a body. They are : F1 = (4,5) applied at (1,2) F2 = (2,-1) applied at (3,-1) F3 = (-3, 2) applied at (-2,1) i) Find the resultant force Answer : R = (3,6) ii) Find the total moment about the origin (This i know how to do) iii) The line of...

The diagram shows a smooth wooden board 30cm long. One end is raised 15cm above the other. A 100g mass is placed on the board. The two forces acting on the 100 g mass are shown in the free-body force diagram. what is the magnitude of the resultant force?

Homework Statement a 3000 kg truck traveling at a speed of 4.0 m/s makes a 90 degree turn in a time of 5.0 s and emerges from this turn with a speed of 7.0 m/s. what is the magnitude of the average resultant force on the truck during this turn? Homework Equations The Attempt at a...

Hi All, I am a beginner at Electromagnetics I'm implementing ray tracing SBR to predict propagation of waves. Each ray contribution will be in the form of: Ei = (some factors) e ^ (- j k r) u(theta, phi) where k = 2 pi / wavelength, r is the total unfolded path I'm not sure about...

Homework Statement A car is on a banked curve of bank angle 18 deg, radius 70m. It's mass is 1020kg. Draw a free body force diagram approximately to scale, when the car is at the 'design speed'. What is meant by design speed? Find the resultant force and the normal force n. Homework...

Hmm. I'm quite confused with this: Does no resultant force means no external force? i.e. if there is an external force, there is a resultant force? Like say, sand falls onto a moving conveyor belt at the rate of 5.00 kg/s. The conveyor belt is supported by frictionless rollers and moves...

This is a engineering question and we are not aloud to use calculus. We are told we have a boat on the bank of a river with a current to the right at 30 mph and the max speed of the boat is 25 mph. The question is, traveling at what angle gives the best chance to make it across? The teacher...

Homework Statement Two forces P and Q with respective magnitudes 100N and 200N are applied to the upper corner of a crate. The sum of the two forces is to the right (+x direction) with a magnitude of 250N. Find the angles that P and Q make with their sum - that is, with the horizontal line...

Two dogs pull horizontally on ropes attached to a post; the angle between the ropes is 59.0 degrees. Dog A exerts a force of 254 N and dog B exerts a force of 328 N. Find the magnitude of the resultant force. Find the angle the resultant force makes with dog A's rope. I'm having...