Angles Definition and 892 Threads

Homework Statement A cable passes around three 2-in-radius pulleys and supports 2 blocks as shown. Pulleys C and E are locked to prevent rotatoin, and the coefficient of friction between the cable adn the pulleys are static = .20 and kinetic = .15. Determine the range of value of the weight of...

1. A skater with a mass of 81 kg is traveling east at 6.4 m/s when he collides with another skater of mass 45 kg heading 60° south of west at 13 m/s. If they stay tangled together, what is their final velocity, and direction in degrees (south of east) 2. Vix = M1V1/M1+M2 and Viy =...

Finding index of refraction using wavelength and 2 angles?? I'm not sure how to do a problem that involves a light ray striking a block/air interface, how to find the index of refraction of a transparent material when given the wavelength, the angle the light ray makes with respect to the...

How is the bond angle for Cl-C-Cl in dichloromethane different from H-C-H bond angle of CH4? Is it smaller??

Homework Statement A small sphere with mass .015kg hangs by a thread between two parallel vertical plates .05m apart. The plates are insulating and have a uniform surface charge densities +σ and -σ. The charge on the sphere is q = 8.9 x 10^-6 C. What potential difference between the plates will...

[b]1. A set of new tires have a diameter of 2.0 ft and are warranted for 60,000 miles. What is the angle through which one of the tires will rotate during the warranty period? [b]2. covert diameter in ft to meters and find the radius: .6096 x .5= .3048 convert miles to meters: 9.65 x...

This question really confuses me, I have got answers before but they don't fit with the answer in the book and it's due tomorrow Homework Statement A large helium balloon is attached to the ground by two fixing ropes. Each rope makes an angle of 50 degrees with the ground. There is a...

Hi guys, This is my first time in this forum, thanks for your time. Now, I learn about spherical angles (vektor) in 3 Dimension I still confuse about the formula, such as: Fx = F sinφ cosθ ( in X axis = i) Fy = F sinφ sinθ ( in y-axis = j) Fz = F cosφ ( in z axis = k) I...

1. A 100N light is suspended from a beam with two wires. Both wires make angles of 40 degrees with the beam. 2. What is the tension in the wires? 3. Ok here's what I have so far... Sum Fx: T2(cos 40)-T1(cos 40)=0 so T2=T1 Sum Fy: T2 (sin 40)+T1(sin 40+(-100)=0 so T2(sin 40)+T1(sin...

Projectile Motion "best angles" Homework Statement Collect sufficient and relevant empirical data to support the claim that for any initial velocity V there is a "best angle" theta 0ba that yields the largest horizontal displacement (change in x). Support the claim that there is a "best angle"...

Homework Statement I need to predict how far a rocket will land given: Delta Y = 2.032 (80 in ) - Height it will be shot from. Angle - 35 (degrees) My Average velocity is 23.3 m/s. I need to repeat this for angles 40-60 [Increments of 5] Homework Equations I have these...

The four sided, a=110.50 ft, b=165.27, c=162.18, and d=a slightly curved line of 146. ft-- (from point to point, it still seems to be 146 feet,) anyway---This from a land survey---I believe the distances of width, center point and (height) can "prove" by the angles. The people I have been...

Hi all, since scattering amplitude is given as: f(theta) = summation over l(from o to infinity)(2l+1)/k exp(i(phi))sin(phi) Pl(cos theta).But what happen if i want to calculate the ratio of f(theta=0)/f(theta = pi/2). Can anyone tell me the value of Pl(0). Thanks

Homework Statement a physics student pitches a sack of doorknobs into the air with an initial velocity of 24.5 m/s at 36.9degrees from the horizontal. i know the: time=3.0s horizontal distance traveled=58.8m time when sack is at max height=1.5s max height sack reaches=11.03m but i need...

1. I am considering the problem of getting the equation for a 3d vector(magnitude irrelevant) in cartesian coordinates when given 2 angles with respect to arbitrary axes. 2. I think that 180-angle1-angle2=angle3 3. So if the angle between the x-axis and the vector is 60deg, and the angle...

[SIZE="5"]SOLVED Homework Statement A car is being pulled out of the mud by two forces that are applied by the two ropes shown in the drawing. The dashed line in the drawing bisects the = 34.0° angle. The magnitude of the force applied by each rope is 3500 Newtons. (I attached the...

what are the dimensions of angles?

Homework Statement quick question...im given the arc length ( 1m ) and the radius ( 1.5m )...to find the angle between the two vectors...do i just plug into angle=S/R? Homework Equations angle = S / R The Attempt at a Solution 1/1.5= 0.67

Dear All, Suppose you have two versors x and y. You would like to calculate the 3 Euler angles between them. How would you do that? You know that x=Ry where R is the rotation matrix (see e..g Goldstein). Now the point is that I know both x and y and want to get phi, theta and psi (no...

Trying to implement QR decomposition using Givens rotations, I calculate G1 to zero n32 of original matrix A, then G2 to zero n31 of G1 * A, then G2 to zero n21 of G2 * G1 * A. Residual matrix, R = G3 * G2 * G1 * A comes upper triangular as expected, so I believe my code is correct. Looking...

mass m suspended by a pair of vertical ropes attached to the ceiling what are the rope tensions if they comprise a V shape each at an angle theta with the ceiling? i have played with this problem for a while and i can't seem to find what the relevant equations are really only first time...

Homework Statement Calculate the knee joint angle based on the XY coordinates of the hip, knee and ankle joint centres. Hip joint(x = 1.0183, y = 0.7959) Knee joint(x = 1.1223, y = 0.5042) Ankle joint(x = 1.0539, y = 0.1081) Homework Equations θjoint = θproximal −θdistal The...

ive got the formula down as angle=cos-1[(u.v)/(||U||||v||) with my u as 3,1,2 and v as -2,3,4 this gives me cos-1[(-6i+3j+8k)/root406) where do i go from here?

I'm having trouble visualizing double angles. What is the physical nature of double angles? I have books which talk about how to do math on double angles. I have seen websites about how to do math on double angles. But I have yet to find out WHAT a double angle really means. Where do they occur...

What would be the easiest way to find a length of a side of a triangle using its angles, with one length of a side given.

how is this done? say angles between 2i -3j -k and 4i+2k-3j got an exam coming up soon and can't find the formula for it anywhere help please?

Hi.. am doing a project to plot the path of a moving vehicle in a coordinate system using accelerometers. To do this, I need to measure the angle that the vehicle rotates when it's going on a road. (Note this is not the tilt) Does anyone know if and how I can do this using only accelerometers...

(SOLVED) Calculator Entry ErrorAngles of Reflection of Light A ray of light strikes a flat 2.00 cm thick block of fused quartz (n = 1.458) at an angle of θ = 27.0° with the normal (Fig. P22.18). Trace the light beam through the fused quartz and find the angles of incidence and refraction at...

Just wandering, I'm about to begin Cal III, I don't ever remember seeing a problem like this. I found the problem in a tool and die mathematics question book with no explanation of finding the answer. I'm wandering if anyone might be able to help me see how the problem should work. In high...

Hi there! I need help with trig. I know how to find angles or sides etc. but the problem is I can't picture what this word problem trying to ask me. It would be great if you show me the picture, and I would most likely know how to figure out the sides. Q1: On a sunny day, the shadows of...

Homework Statement Two 75.0 kg hockey players skating at 5.90 m/s collide and stick together. If the angle between their initial directions was 135°, what is their speed after the collision? (Let the motion of player 1 be in the positive x-direction and the motion of player 2 be at an angle...

Homework Statement Im an apprentice electrition and my 2nd year principles exam is coming up. the question i ask is about Phase angles. It asks me to represent my data using a phase angle but in the book I am using there are no equations to show me how to get my phase angle. I am working on my...

We have the left-hand (motor) rule. We know exactly what happens when we run a current in a magnetic field. Its reversible! The right hand (generator) rule tells us what voltages and currents occur when we move the conductor in a magnetic field. Interesting we have to do work to get it done...

[SOLVED] Wording Question Regarding Angles If it says "to the horizontal", such as 30 degrees to the horizontal, would the angle be measured from Y or X? I measured it from the horizontal, but reading it over, it sounds like it's measured towards the horizontal, so I was thinking it may be from...

Homework Statement You are playing bocci with your friends. You roll your ball towards your opponent's stationary ball (of equal mass) with a certain speed. After the collision, your ball travels along a path o32 degrees from its original path with a speed of 2.50m/s, while your opponent's...

i don't know what this angle on my paralellpiped is. basicallt just a trapazoid extruded on an angle. but also half of the front face is pushed back. i need to no what angle it is pushed back. dimensions are: 10 by 8 with 120 60 degress (front n back face) 10 by 6 with 120 n 60 degress...

[SOLVED] Prove: Sum of angles > 180 in curved space Homework Statement If I have a positively curved space (i.e. a sphere) and I draw a triangle on it, the sum of the angles of the triangle exceed \pi, more precisely, v1 + v2 + v3 = pi + A/R^2 where v1, v2 and v3 are the angles of...

Homework Statement Tree A is 10 m tall. Tree B is 60 m tall. You're standing on level ground at a position that is 25 m from tree A and 75 m from tree B. You're eye height is 1.5 m above the ground. Find the ratio of theta B/ theta A, of the angles (measured from the horizontal) at which you...

Electric force angles problem :( Homework Statement Three positive particles of charges 11.0 µC are located at the corners of an equilateral triangle of side d = 14.0 cm (Fig. 16-38). Calculate the magnitude and direction of the net force on each particle. Fig. 16-38 Homework Equations F =...

Three Dimensional Angles?!? ok, this is a stretch. I have an idea. If there are angles, measured in units of 1/360th of a circle. what happens when you add the third dimension factor. I thought it would be somehow measured in units of like the area of a sphere divided by 360^2 maybe. The...

Many of us have seen how to find a vector satisfying the following conditions (i) magnitude is m (ii) makes angles alpha, beta and gamma with i,j,k vectors i.e. unit vectors along x,y and z axes. My question is can the angles be taken arbitrarily or they should satisfy some condition like...

1) We know that if \theta is trisectible (with straightedge and compass), then \theta/3 is constructible. But is it also true that if \theta/3 is constructible, then \theta is trisectible (with straightedge and compass)? If so, then I can say that since 15o is constructible, we have that...

Homework Statement http://img150.imageshack.us/my.php?image=toottzx0.png Homework Equations I have the picture and everything but i just need help with the angles. Like i am a bit confused about how to draw the angles and stuff please help. The Attempt at a Solution

Homework Statement Joe Carter hit a fly ball during the spring training. It just cleared a 10m high vertical fence on the way down at 45 degrees as shown and struck the level ground 8m beyond the fence. Calculate the speed of the ball when it left his bat at ground level (start and end...

[SOLVED] HW: Newton's Second Law and Angles Homework Statement The system shown in the figure can be used to measure the acceleration of the system. An observer riding on the platform measures the angle (theta) that the thread supporting the light all makes with the vertical. There is no...

Hi, I'm new to the forum. I have a 3 axis accelerometer that I am trying to obtain roll and pitch from. Besides the accelerometer itself, I was provided the raw data values of what each axis will report when it has 0g being applied to it and when it has 1g being applied to it. Using this I...

Homework Statement how can you find the initial velocity if the angle, horizontal distance and the vertical distance is given?Homework Equations The Attempt at a Solution every equation i use gives me a different answer so i have no clue which one is correct

[SOLVED] Simple Vector Sum Problem... But My Calculated Angles Weird... Homework Statement A car travels 210 m [N32°E] and then travels 37 m [S51°W]. How far is the car from the origin? Homework Equations Cosine Law. C^2=A^2+B^2-2(A)(B)(CosC) Sine Law. C/CosC=A/CosA The...

Thanks.

Homework Statement I need to prove the following equation: cos^2 A + cos^2 B + cos^2 C + 2*cosA*cosB*cosC = 1 where A,B,C are the angles of a triangle Homework Equations A+B+C = 180 The Attempt at a Solution I substituted the sum of A,B,C into the equation, and now I have something...