Horizontal Definition and 960 Threads

A string, 50cm long, has a stone of 100g tied to its end, and it is swung in a horizontal circle of radius 30cm. Calculate the tension in the string. Because the string is longer than the radius of the circle, the path of the string must form a cone shape. Using the measurements, and forming...

a block slides along a horizontal plane at an initial velocity of 10m/sec. After sliding 4 meters it reaches a 35 degree incline and slides up the hill. the coefficient of kinetic friction is 0.4 for all surfaces. a) how fast is it going when it reaches the incline? b) how far up th incline...

Homework Statement 20. A 873-kg (1930 lb) dragster, starting from rest, attains a speed of 26.3 m/s (58.9mph) in 0.59 s. -----a. Find the average acceleration of the dragster during this time interval. My solution: Given variables: M=873kg Vo=0 Starting time: 0 V=26.3m/s T=0.59...

Homework Statement Draw and FBD of a rubber stopper (mass) in circular horizontal motion. Be realistic here: Is the tension force on the stopper truly horizontal? This question is from an experiment where a rubber stopper is tied to a string and swung horizontally. When the question says...

Homework Statement 1. A sled is pulled at a constant velocity across a horizontal snow surface. If a force of 8.0 x 10^1 N is being applied to the sled rope at an angle of 53 degrees to the ground, what is the force of friction between the sled and the snow? A. 83 N B. 64 N C. 48 N D...

Here a newsstory about horizontal gene transfer: Compare with neodarwinism: Since gene swapping by organisms causes genetic variation, does this contradict neodarwinism which claims genetic variation is caused by random mutations?

I've built a horizontal spring launcher, and i need to calculate the extension needed in the spring in order to launch a projectile horizontally to a given distance. The launcher consists of a striker connected to the spring... when the spring is pulled back and let go the strike moves...

The most important question to answer here is what happens when an object undergoing Uniform Horizontal Circular Motion(tethered to a string, NOT using gravity as sole centripital acceleration) will behave when it reaches that perfect right angle to gravity. I would like to insert a drawing but...

I don't have a diagram for this, so I'm going to do my best to describe it. A glass tube lying horizontally has three different cross-sectional areas, A, B and C. Area A is 12 cm^2, B is 5.6 cm^2, and C is 6.0 cm^2. Mercury (density = 13,600 kg/m^3) is being pushed through the tube by a...

Homework Statement A bicycle has 30cm radius tires with gear and pedal dimensions as shown. IF the maximum vertical force that a 70kg rider can exert is equal to his/her body weight, what is the horizontal force that can be exerted on the ground by the rear tire...

A block of mass 3.0 kg starts at a height 0.60 m on a plane that has an angle of 30 degrees from the horizontal. Upon reaching the bottom, the block slides along a horizontal surface. If the coefficient of friction on both surfaces is 0.20, how far does the block slide on the horizontal surface...

Hi all, I am having difficulty with a question. I would like some guidance. QUESTION: A block rests on a frictionless horizontal surface and is attached to a spring. When set into simple harmonic motion, the block oscillates back and forth with an angular frequency of 9.5 rad/s. The drawing...

A small block of mass 0.91 kg slides without friction on a horizontal table. Initially it moves in a circle of radius r0 = 0.63 m with a speed 1.5 m/s. It is held in its path by a string that passes through a small hole at the center of the circle. The string is then pulled down a distance of r0...

the equation is: x^2 + xy + y^2 = 25 my method was to implicitely differentiate and then set the numerator = 0 to get points of horizontal asymptotes, and then set the denominator = 0 to get the points for the veritcal asymptotes. when i use implicit differentiation i get: y' = (-2x...

I need help with this problem (my work is at the bottom): http://img96.imageshack.us/img96/9823/physicsquestiondd9.jpg Here is what I tried: a_x from graph = 3 m/s^2 Fnetx = m* a_x F_n_e_t_x = 3.9 N F_n_e_t_x = -3 + F_2*\cos(\theta) 6.9 = 9.0*\cos(\theta) \cos(\theta) = 0.7667 \theta =...

hi guys.. could you please explain why 2.0x10^1 meters is the answer of the horizontal distance between the log and the bridge when the stone is dropped from rest from a 75-m-high bridge and lands on the log as it passess under the bridge if the log moves with a constant speed of 50 meters per...

Two wires are tied to the 500 g sphere shown in figure.The sphere revolves in a horizontal circle at a constant speed of 8.40 m/s. The two wires part of it is throwing me off. I can do it if it was just one string or two strings if it isn't moving but I am not sure how to do it with circular...

The acceleration of a particle on a horizontal xy plane is given by a=3ti + 4tj, where a is in meters per second-squared and t is in sec. At t=0, the particle has the position vector r=(20.0m)i + (40.0m)j and the velocity vector v=(5.00m/s)i +(2.00m/s)j. At t=4.00 s, what are its position...

Im studying for my test and I have a problem from my previous notes. It should be simple but I am having some difficulty. '' A cannon is shooting horizontally at a target. The cannonball strikes .2m below the bullseye. If the initial speed of the cannonball is 956m/s, what is the distance...

given the latitude and longitude of a place, how can you use the horizontal system of celestial coordinates to find the location of the north celestial pole from an observer standing on that place? For me, it's quite hard to imagine the Earth as a sphere, if 2-dimension, it's fine for me...

Two blocks (M1 = 5kg and M2= 10kg) are pushed so that M1 is not touching the ground (in the air). The horizontal surface is frictionless but there is a friction between the two blocks (mu_k = .4 and mu_s = .5). Find the minimum force F needed so that M1 will remain "in the air" as the blocks...

What are the horizontal asymptotes of cot^(-1)x I don't understand because isn't that tangent and it has asymptotes?!

A curve in a road forms part of a horizontal circle. As a car goes around it at constant speed 13.3 m/s, the total force on the car (due to friction with the road) has magnitude 127 N. If the driver would have been driving 16.8 m/s, what would the force have been instead? ∑F= mac = m* v^2/r...

A 100 kg crate is pushed at constant speed up the frictionless 27° ramp shown in the figure. What horizontal force F is required? What force is exerted by the ramp on the crate? I can't paste the figure up so I hope this question describes the scenario well enough. What's giving me...

The horizontal beam in Fig. 11-25 weighs 170 N, and its center of gravity is at its center. (a) Find the tension in the cable. 641.66 N (b) Find the horizontal and vertical components of the force exerted on the beam at the wall. 513.33 N (to the right) ? N (upwards) Any tips on...

http://img151.imageshack.us/img151/8411/physicsks7.jpg http://www.glpics.com/cristianb/Pics/penguin%20physics.JPG How would I go about solving this problem? Do you just ignore the sled and snow friction? Any help would be great.

A baseball hit at an angle of a to the horizontal with initial velocity v0 has horizontal range, R, given by R = (v02 / g)sin(2a) Here g is the acceleration due to gravity. Sketch R as a function of a for 0 < a < pi/2. What angle gives the maximum range? What is the maximum range...

The problem states; A projectile is fired horizontally with an initial speed of 50m/s. neglect air resistance. What is the magnitude of the displacement of the projectile 3 seconds after it is fired? What is the speed of the projectil 3 seconds after it is fired? I used this equation to get my X...

The question states; A projectile is fired at an angle of 60 degrees above the horizontal with an initial speed of 30.0m/s. How long does it take the projectile to reach the highest point in its trajectory? Ok so I was able to find the maximum point (34.44m) by finding the Y component...

ok, so i just had my exam 10 minutes ago and i can't think of anything else except this seemly easy problem that i couldn't get. a football is kicked on the horizontal plane (ie. y_0 = 0 ) at some angle alpha, it covers a horizontal displacement of 100 ft 2.5 seconds later, find the initial...

Does anyone know where I can find the governing equations on the heat transfer of a horizontal, closed loop system? e.g. http://www.eere.energy.gov/consumer/images/closed_loop_system_horiz.gif I've tried searching online, and all I can find is the general overview, no equations :frown...

One end of a chord is attached to the ceiling at D and another to the wall at A. Masses of W kg and 20 kg are attached to the cord so that it assumes the shape shown on the right. Find W and the tension in each of AB, BC, and CD. http://img126.imageshack.us/img126/9884/forces4zx.jpg stuck on...

How do I create a horizontal space between 8 turns and 6 seconds? \left(\frac{8 turns}{6 seconds}\right)

Hi, I have a physics question I'm not sure how to answer. I need to find the horizontal distance a ball will travel when rolled down a ramp off a table. The height of the table is 70.5cm The time it took to leave the table and hit the ground is 0.335s Using trial and error we found that the...

a point mass is constrained to move in a horizontal plane and is attached to four fixed pegs by 4 light springs. The four pegs are arranged at the corners of a square of side root2*a. Each spring has a natural length of a/2 and a spring constant a. If the mass is displaced towards one corner...

in the diffraction experiment, the light source and the slit are in the same horizonatal line. My question is, if the light source is placed at another position which is no longer in the previous horizontal line, would we still get the same diffraction pattern? Will the diffraction pattern...

Water weighs about 6lbs per gallon. So if one has a column of water, say, at 10 gallons, the pressure over an area is about 60lbs. This can be deduced to pounds per square inches. Question: How much pressure, per square inch, does water exert on a vertical wall such as a swimming pool...

A shelf bracket is mounted on a vertical wall by a single screw, as shown in Figure P12.59. Neglecting the weight of the bracket, find the horizontal component of the force that the screw exerts on the bracket when an F = 86.0 N vertical force is applied as shown. Ok so we have three...

This question I was working on last light though I've solved it (by doing as the book has shown)...is giving me major cause for concern... I'm going to have to slightly re-word the books question so as to explain it without a diagram: A particle P of weight 2kg is fastened to a length of...

I was thinking about a question where when 2 similar objects with different masses were dropped from the same height that they would hit tthe ground at the same time. It then occurred to me if the same would happen if the objects were given a horizontal component. i.e if they were rolled off an...

An object of mass 4.0 kg is whirled in a horizontal circle of radius 0.40 m with a constant speed. If the tension in the wire is 80 N, a=20 m/s, v= 2.83m/s, T= 0.89 s find: d the number of revolutions made every minute.

in a water tank involving the launching of a small model boat,the model's initial horizontal velocity is 20ft/s and its horizontal acce varies linearly from -40ft/s^2 at t=0 to -6ft/s^2 at t=t(1) then remains equal to -6ft/s^2 until t=1.4s.Knowing that v=6ft/s when t=t(1), determine the value of...

is there a horizontal asymptote for y=(lnx^2)/(x^2) i know u take the lim to find h.a but what is ln infinity/infinity?

ok have a look at the diagram posted. When someone broke their femur (thigh bone) the muscles around the femur would compress tightly and thereby shorten the bone once it heals back. SO the apparatus described in the diagram is what they used to do to prevent the femur from growing back shorter...

Could somebody give me a quick demo of how to convert from one system to another. I have a homework to do and none of my lecture notes seem to help me!

A 50kg sprinter, starting from rest, runs 50m in 7.0s at constant acceleration. a) What is the magnitude of the horizontal force acting on the sprinter? b) What is the sprinter's power output at 2.0s, 4.0s, and 6.0s? I think maybe the 'magnitude' part is confusing me. F = ma V(avg) =...

Hi! If anyone could pass on any hints as to how to go about figuring out this type of problem...thanks! I just need guidance as to how to determine F... attached is a diagram. The horizontal surface on which the object slides is frictionless. If M=4.0kg, the tension in string 1 is 12N...

Hi , please help me with this question We have 3 blocks on an horizontal surface (frictionless). We apply a force F=8N What are the forces on each 3 blocks. My solution: For the block 1 I found: m1g(down), Normal reaction R1 ( up), R2/1 (left) Here is there an R1/2 (right) force of...

Ok...Here is the problem. A block of mass 4 kilograms, which has an initial speed of 6 meters per second at time t=0, slides on a horizontal surface. (a) Calculate the work W that must be done on the block to bring it to rest. For this problem, I used the formula W= 1/2mvf ^2– 1/2mvi ^2...

You buy a plastic dart gun, and you wnt to find its max. horizontal range. you shoot the gun straight up, and it takes 4s for the dart to land back at the barrel. What is the maximum horizontal range of your gun? I got the initial velocity, which is 19.6 m/s. I know I have to incorporate...