Horizontal Definition and 960 Threads

I need to build a completely horizontal projectile launcher for my physics class. I started experimenting with a Gauss rifle, but the horizontal velocity was hardly even 1m/s, even with strong magnets. I'm looking into a few other propulsion mechanisms, such as pressurized air (like a spud gun)...

If this sounds ridiculously vague, I apologize - my physics teacher gave us this problem verbally and didn't want to clarify anything. Homework Statement A ball is thrown at a 45 degree angle to the ground and remains in the air for 2.35 seconds by an individual standing 1.81m. How far did...

Homework Statement A uniform horizontal rod of mass 2.3 kg and length 0.32 m is free to pivot about one end as shown. The moment of inertia of the rod about an axis perpendicular to the rod and through the center of mass is given by I = (ml^2)/12 If a 4.6 N force at an angle of 76 to...

Homework Statement Block C (m= 4 kg) sits on a frictionless horizontal surface. Block B of (m = 2kg) sits on top of block C, and is attached to a rope that runs over the massless pulley as shown in the figure. Block A (m=1 kg) hangs vertically from the rope. With what horizontal force F must...

This is just a general concept question. Why is that an equation with a numerator to a greater degree than the denominator has no asymptote & the opposite does? Also why is the coefficient of the variable to the highest degree the horizontal asymptote? Maybe a proof would help here :P Anyway...

A flea is at point A on a horizontal turntable 8.1 cm from the center. The turntable is rotating at 33.9 rev/min in the counterclockwise direction. The flea jumps vertically upward to a height of 4.11 cm and lands on the turntable at point B. Place the coordinate origin at the center of the...

Homework Statement Suppose a mountain is described by the function z = 10x^2 * y − 5x^2 − 4y^2 − x^4 − 2y^4 and that you are standing at the point (1,1,−2). The positive x-axis points east and the positive y- axis points north. If you walk in the northeast direction what angle above the...

Friends: Recently I got this problem: what sustained horizontal wind pressure/force is needed to make a pendulum swing up and stay at a certain angle? To solve this problem, I imagined applying a horizontal force FH to the bob (of mass "m"). I learned that the angle that the pendulum makes...

Homework Statement is a spring longer hanging down or horizontal Homework Equations The Attempt at a Solution i think that the spring is longer hanging down because then its own mass contributes to the force of gravity, making it stretch more.

A table tennis ball of mass 10g carries a charge of 0.04 micro Coulombs. It is suspended at the end of a rine threa 25cm long and placed in a horiztonal electric field. The effect of the field is to move the ball's centre 1.5cm to on side of a vertical line through the point of suspension...

As you know,pressure is the same at points on the same horizontal plane Okay,suppose two points A,B in a fluid are on the same horizontal plane [PLAIN]http://img197.imageshack.us/img197/1977/unledfhe.jpg the pressure on both points is the same but at A pressure=h2*ρg pressure at B=h1ρg...

Homework Statement A student ties a 400g rock to a 1.0m long string and swings it around her head in a horizontal circle. What angular speed does the string tilt down at a 10° angle? m = 400g = .4kg r = 1m Homework Equations F = \frac {mv^2}{r} \omega = \frac {|v|sin \theta}{|r|}...

Homework Statement A car drives straight off the edge of a cliff that is 53 m high. The police at the scene of the accident note that the point of impact is 139 m from the base of the cliff. How fast was the car traveling when it went over the cliff? Homework Equations...

Homework Statement A box weighing 80N is pulled along a horizontal surface by a force of 15 N which is directed at 20° above the horizontal. If the box started from rest and the coefficient of friction is 0.15, find the kinetic energy and velocity of the box after it traveled a distance of...

I finished with my first semester of physics in Spring, and I thought that I had understood the unit on springs pretty well; however, today a friend gave me this problem to solve, and I’m drawing such a massive blank, it’s not even funny. I’m so frustrated with this problem. Homework...

Homework Statement Revered Members, I have attached two images which explain horizontal and vertical oscillations of a loaded spring. In horizontal oscillations the restoring force is taken as F = -kx. But in vertical oscillations the restoring force is taken as F = kdl. Homework...

A ball is thrown up onto a roof, landing 3.70s later at height h = 21.0m above the release level. The ball's path just before landing is angled at θ = 54.0˚ with the roof. Find the horizontal distance it travels. Answer: 33.5m Related Equations: Xf = Xo + 1/2(Vf + Vo)t...

Physics: Newton Law of Motion Question? I am a bit confused about this elementary question. If anyone can guide me in the right direction, I would appreciate it. Picture: http://tinypic.com/r/14w84g1/7" 2 boxes are placed next to 1 another on a horizontal surface. The box on the left has...

Homework Statement This probably seems really obvious but what formula do you use to find velocity with conservation of energy? Once you find the velocity, is it the velocity of the object at the bottom of the height? Homework Equations This is what I'm not sure about. Is it mgh=0.5mv^2?

Homework Statement A tennis ball is thrown horizontally from an elevation of 13.03m above the ground with a speed of 24.0m/s. a)where is the ball after 1.50 seconds (both horizontally and vertically)? b) if the ball is still in the air, how long before it hits the ground? c) if...

Hey folks its me again! The problem at hand gives me a potential energy function ( V(x) ) that defines the height of a particle in motion. Next to the problem is a picture of a curvy graph that is y vs x. It asks to find the expression for the horizontal acceleration. This is what I did...

Homework Statement So I need a motor for a project. The motor I'm looking at creates circular motion. I want to make the motor move some object in a horizontal motion but I want to know how fast it can move the object horizontally before getting it. How can I find out how fast the motor can...

Homework Statement "Oil weighing 9000N/m3 is to be pumped out of the top of a horizontal cylindrical tank of radius 5m and length 15m. Set up an integral to find the work required to pump out the oil to the top of the tank if the depth of the oil is 4m." Homework Equations I used y =...

Homework Statement During an Apollo moon landing, reflecting panels were placed on the moon. *This allowed earth-based astronomers to shoot laser beams at the moon's surface to determine its distance. *The reflected laser beam was observed 2.52 s after the laser pulse was sent. *What was the...

New to the forums, just starting a physics 11 course online and having some troubles with formulas. Homework Statement Projectile shot straight upwards, flight time = 4.70 sec Second Launch at 45 degrees (horizontal range approx. 50-60 meters A) Find Launch Velocity B) Find...

Homework Statement What is the maximum vertical height to which a baseball player can throw a ball if his maximum throwing range is 54 m? vertical: a=9.8 m/s/s, Vyo=0 m/s, d=?, t=? horizontal: d=54 m, a=0 m/s/s, Vxo=?, t=? Homework Equations d=Vo*t+.5*a*t^2 The Attempt at a...

Homework Statement A projectile is launched with an velocity of 40 m/s and crosses a tower of height 20.4 m after 2 seconds. Find the angle of projection with the horizontal and the horizontal range. Homework Equations S = ut - 1/2 gt2 where S is the distance, u = 40 Sin\Theta and g...

Homework Statement Whether or not the spring is vertical or not, assuming that the spring is ideal, is Fnet always equal to -kx? Is it incorrect to write the sum of the forces of a vertical spring as Fnet = -kx - mg? And does hooke's law account for the force of friction on a horizontal...

A ball is thrown with an initial speed of 4.6m/s at an angle of 15(degrees) below the horizontal. It is released 0.80m above the floor. What horizontal distance does the ball cover before bouncing? I keep getting 2.4m as my answer, but it's wrong! Here's what I did (Please correct...

This was an even numbered problem from the book so there are no answers to make sure I've done this correctly or not. Homework Statement An arrow fires horizontally at 41 m/s travels 23 m horizontally. From what height was it fired? Vi = 41 m/s a = g = -9.8m/s x = 23m Homework...

Homework Statement The man is 3m high from the saddle on a tree limb. The horse is running at 10m/s. A) What is the horizontal distance necessary for the men to land on the horse B) How long is he in the air Homework Equations I used y/accel to get the amount of time for him...

I need a little help understanding which method would be the best way to keep fuel atomized for the longest period of time. I have a CV carb (more specifically a Keihin CV 40) and I'm wanting to install a Dial A Jet. *If you'd like to learn more about the Dial A Jet, go here...

An object is thrown of a given H height by a given Vo initial velocity. Calculate the biggest horizontal distance the object can reach from the starting point. It was a questioon from the national physics olympiad in my country. I tried to solve, but I was not able toif the object is thrown...

Homework Statement Calculate the tension in a 2m string attached to a 2kg bob that is moving in horizontal circles of 0.5m radius. Homework Equations I thought it was F=MA but the working out shows all sorts The Attempt at a Solution I know the answer is 78.4N but don't know...

Homework Statement A uniform cylinder, of radius 2a and moment of inertia $2Ma^2$ is free to rotate about its horizontal axis. A light, inextenzible string is wound round the cylinder and a particle of mass m is suspended on its free end. If the system is released from rest, find the...

Horizontal water rocket thrust calculations - HELP! Hi All, I want to accelerate a 90kg body at a rate of 2 m/s2 for a period of 1 second using thrust developed from a number of water bottle rocket jets. Based on the drag coeff calculated I believe I need to develop 190N of force. A...

This is one of the questions at the mechanics finals that I skipped. Homework Statement http://img155.imageshack.us/img155/1702/mecccs.jpg In the drawing is described the trajectory of a stone cast from a cliff at point A in an initial horizontal velocity V. During its motion the stone...

Hello, I was playing with formulas on air resistance and derived formula for velocity in horizontal direction after object was thrown. It looks reasonable but I started have confusion about it, i'd like for you great experts check on its derivation, so here it goes every v is v in x direction...

Homework Statement http://img864.imageshack.us/img864/8066/graspcc.jpg the uniform horizontal beam AC, is held at tip A by a circular joint, and at point B it's held by 2 cables, BD and BE, as described in the drawing. At tip C of the beam acts a vertical force, F: Given W = 1 [kN] F = 4...

Frictionless, horizontal table...radius and speed...? The 0.20 kg puck on a frictionless, horizontal table is connected by a string through a hole in the table to a hanging 1.20 kg block. With what speed must the puck rotate in a cicle of radius 0.50 m if the block is to remain hanging at rest?

Isolating "t" in horizontal motion equation Homework Statement So this is just a practice question from my course and they gave me the answer, the problem I am having is understanding how they got to that answer. I have the formula and everything, just don't know how to isolate "t" and the...

Homework Statement The problem is attached Homework Equations L=mr^2(dr/dt) V_escape=(GM/R)^.5 E=L^2/(2mR^2)-(GMm)/R=0 The Attempt at a Solution after some work i got: dr/dtheta=((r^3/R)-r^2)^1/2 dont know what to do from here. Thanks.

Homework Statement Sketch the graphs of the following function showing vertical and horizontal asymptotes and relative extrema: f(x) = (x2-1)/(x2-4) Homework Equations Limits, zeroes, derivatives The Attempt at a Solution I know that I have the majority of the answers right, the...

Homework Statement Find the horizontal asymptote of f(x) = (x2-1)/(x2-4) Homework Equations Limits The Attempt at a Solution I'm pretty family with the process, I just get confused when there's an x2 in the denominator and no x in the numerator ): So I already figured out that...

Homework Statement Question: 2 Blocks A and B are resting on a horizontal plane and connected by a cord as shown in figure. The Block A starts from rest and moves to the left with constant acceleration.It was observed that the Block B attains a velocity of 12 m/s after moving a distance...

Hi :smile: A horizontal disc has a hole through its center. A string passes through the hole and connects a mass m on top of the disc to a bigger mass M that hangs below the disc. Initially, the smaller mass is rotating on the disc in a circle of radius r. What must the speed of m be such...

Homework Statement The Attempt at a Solution Please tell me how will there be an SHM?

Hello again, Sorry for posting two threads in one day. This is a general question. Suppose we have a box on a rough surface (fk). The box is being pulled by a horizontal rope(T1), and is moving with a constant speed v=0.5 m/s. Now suppose there's exactly similar situation but with...

Homework Statement A jet flying at 250m/s at an angle of 20 degrees above the horizontal releases a bomb 200m above the ground, how far does the bomb travel horizontally before hitting the ground? Homework Equations vix = vicosthetha viy= visinthetha not sure what else... The...

Homework Statement A car is traveling at 50 mi / hr on a horizontal highway a. If the coefficient of static friction between the road and tires on a rainy day is 0.100, what is the minimum distance in which the car will stop? b. What is the stopping distance when the surface is dry and μs =...