Vertical Definition and 1000 Threads

First, let us consider an object launched vertically upward with an initial speed v. Neglect air resistance. What is the speed of the object at the height of (1/2)h max? i know that h max = (initial v in the y direction / 2g) and i also know that Kinitial +Uinitial =Kfinal +Ufinal or 0.5(mv^2) =...

Homework Statement A ball is thrown stright up with the speed 25m/s how high does the ball go? Homework Equations S=v*t or V=vot+at I know gravity is a neg acceloration so I should have -9.81 somewhere The Attempt at a Solution I need to find the time first am guessing so, T=s/v...

Does anyone know the symbol for a vertical subset symbol?? i.e the equivalent of \subseteq but which points up (i also need one which points down)?? Thank for the help

[SOLVED] Vertical projectile Homework Statement Is it true that a projectile launched vertically with initial velocity v_0 has total energy E = \frac{1}{2}m{v_0}^2 - G\frac{Mm}{R} where R is the radius of the earth? And to find the maximum height I set the total energy equal to...

Homework Statement A kangaroo jumps to a vertical height of 2.3 m. How long was it in the air before returning to Earth? Homework Equations kinamatics The Attempt at a Solution i got .68 which i think is rite but i don't know what do you get?

Anyone know how long a typical let's say news helicopter can last in the air given how much fuel it holds? I am not sure but I heard a news helicopter or a police helicopter probably won't last more than 3 hours in the air. Some military transport helicopters can only do about 2 and attack...

An object, suspended from a vertical spring, oscillates up and down at 5.87 Hz. How much would this object stretch the spring, if it were hanging at rest?

can anyone help me start this problem? Besides its weight, a 2.8 kg object is subjected to one other constant force. The object starts from rest and in 1.2s experieces a displacement of (4.2i - 3.3j) m, where the direction of j is the upward vertical direction. determine the other force

its asking me to find the value of p so that the function won't have a vertical asymptote: g(x) = (3x + p) / (x^3 + 8) however, I'm not sure how to figure that out...any help?

Hey, Simply I want to figure out what produces the reaction force, in this picture i drew, a reaction force appears directing in the same direction as the weight force, any ideas why? Sorry for the bad drawing The example shows a cyclist going around a loop (upsidedown)

angle of vertical path? Homework Statement A descent vehicle landing on the moon has a vertical velocity toward the surface of the moon of 31:7 m=s. At the same time, it has a horizontal velocity of 58:6 m=s. the combined velocity is 66.625m/s At what angle with the vertical is its...

Two basketball players are essentially equal in all respects. (They are the same height, they jump with the same initial velocity, etc.) In particular, by jumping they can raise their centers of mass the same vertical distance, H (called their "vertical leap"). The first player, Arabella...

Homework Statement A rock climber throws a small first aid kit to another climber who is higher up the mountain. The initial velocity of the kit is 11 m/s at an angle of 65 degrees above the horizontal. At the instant when the kit is caught, it is traveling horizontally, so it's vertical speed...

Homework Statement A bridge rises 321m above the Arkansas river. Suppose you kick a rock horizontally off the bridge. The magnitude of the rock's horizontal displacement is 45.0 m. Fine the speed at which the rock was kicked. Homework Equations Vi=Vx. Dx=45m. Dy=-321m The Attempt at...

Homework Statement A vertical force F is applied to a block of mass m that lies on a floor. what happens to the magnitude of the normal force N on the block from the floor as magnitude F is increased from zero if force F is a)downward b)upward Homework Equations Let m be the mass of...

I am trying to find out how fast a vertical cylindrical water column heats due to the ambient temperature. I already calculated the heat transfer due to conduction but I am now interested in the role of natural convection. So to be clear there is a temperature difference between the walls and...

1. A car of mass 1500kg moving at constant speed of 80km/hr passes over a humpback of a bridge of radius of curvature r. The car remains in contact wit the road as it passes over the top. a) Express N, net force exerted by the car on the road, in terms of r. b) Determine the minimum...

Homework Statement Apologies for so many posts, however this is the last question. A stone his thrown vertically upwards with speed 16m/s from point h meters above the ground. The stone hits the ground 4s later. Find the value of h. The Attempt at a Solution I really haven't a clue on...

Hi, I'm trying to get the rig for my physics project set up which requires some constant water flow through the system. Unfortunately it's requiring a bit more water inflow than the tap can provide. I measured the tap's flow rate to be somewhere around 0.1L/sec to 0.3L/sec Now because I...

Homework Statement One of the fastest recorded pitches in major-league baseball, thrown by Billy Wagner in 2003, was clocked at 101.0 mi/h (Fig. P3.22). If a pitch were thrown horizontally with this velocity, how far would the ball fall vertically (in feet) by the time it reached home plate...

I want to draw the V- and M-diagramme for this beam: http://www.badongo.com/pic/646161 Am I on the right track? I find it difficult to calculate M here. What should I do?

Homework Statement http://img407.imageshack.us/img407/5642/resumestuff004bm5.jpg A 135 N vertical force P is applied to A to the bracket shown, which is held by screws at B and C. (a) Replace P with an equivalent force couple system at B. (b) Find the two horizontal forces at B and C...

Hey, I'm just having some trouble getting started with this problem. ------------- ( ) ( m1 ( ) ( 2m1 Crude representation: (The parantheses are supposed to be the springs) There is a mass (m1) that is attached vertically to a board by a spring of...

If an object is tied to a string in vertical circular motion (yes, I mean vertical as in the string has the force of gravity acting on it), does it actually change speed? I was given a question where the 'average speed' of an object in vertical circular motion was 6.1 m/s, and then they wanted...

Homework Statement Basically i have been given a set of data to analyse. The data was collected by rolling a ball of a ramp. The ramp is set on a table and the edge of the ramp is parralel to the table. The ball then travels through the air until it hits a piece of carbon paper. The vertical...

Homework Statement a list of data is given for a seat on a ferris wheel that is traveling in a circle. the data is time vs its vertical velocity. the question is to estimate the diameter of the ferris wheel. Homework Equations n/a The Attempt at a Solution what i did was...

Hi. When a plane travels in a vertical circular loop, what is the provider of the centripetal force, required to produce the circular motion? At the top of the loop, there is gravity acting towards the center of the circle, so id assume that this is part of it, but what about at the bottom...

Homework Statement Explain why applied force is plotted on the vertical axis of the graph even though it is the independent variable in a Hooke's Law experiment (involving a mass being attached to the spring) Homework Equations Fx = kx The Attempt at a Solution Maybe it's because...

1. Homework Statement . The correct answer is E 2. Homework Equations :Procedure from our text: "Step 1. Determine the differential equation for the given family F(x, y,C) = 0. Step 2. Replace y' in that equation by −1/y'; the resulting equation is the differential equation for the family of...

I learned that vertifcal tangents occur at a parametric curve if the derivative of the curve is undefined. That is given dy/dx = dy/dt / dx/dt, a vertical tangent occurs when dx/dt = 0. I don't understand why this is so. I know that vertical tangents occur when the slope is infinite, but...

Homework Statement A mass m is thrown vertically from the surface of the Earth with a velocity v0. Find a function that describes the velocity v of the mass m in dependence of its distance z from the center of the earth. Homework Equations m*z'' = -G* m*M / z^2 z'' = dv / dt G =...

Loop the Loop problem help. The Problem says that there is a little car going at an initial speed of 4 m/s while entering a vertical loop the loop. Then all it wants is the largest possible radius of the loop that the car can still remain on the track at all times. I don't understand, the...

Solved the problem.

Surprisingly, very few humans can jump more than 2 feet (0.6 m) straight up. Solve for the time one spends moving upward in a 2-foot vertical jump. Then double it for the "hang time" - the time one's feet are off the ground. b) Calculate the vertical height of Michael Jordan's jump when he...

Okay, I need to demonstrate circular motion of this ride(only the vertical rotation, not the spinning disc that holds the people): http://www.sixflags.com/parks/stlouis/Rides/excaliber.html I only really understand circular motion vaguely, I'm not sure whether this is uniform or...

An 8.00 kg stone rests on a spring. The spring is compressed 7.0 cm by the stone. (a) What is the spring constant? 11.2 N/cm (b) The stone is pushed down an additional 30.0 cm and released. What is the elastic potential energy of the compressed spring just before that release? 76.7 J...

Hello there! My study mate and I have been trying to figure this one out but have not had success. This is the problem we would appreciate to get some help with: A ball with mass of 20 grams is attached to a robe and is revolving vertikal in a circle. There is no energy beeing added to...

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...

This is a example in my book a rational function like f(x) = [(x+2)(x-5)]/[(x-3)(x+1)] has vertical asymptotes at x=3 and x=(-1) Is all you do is switch the addition and subtraction signs in [(x-3)(x+1)]? The same equation has a horizontal asymptotes at y=1, which i can't seem to...

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i have this assignment. a ball is throun into the air withe the speed equal to 49m/s and i need to find out after how many seconds it will reach 102,9 m. i used the formula we were given in class height=initial speed*time-[(Gravitational acceleration* time^2)/2]...

Hi. Consider an object attached to the end of the string that is whirled vertically in a circle of radius r. When it is @ degrees from the horizontal, it has the speed v and the tension in the string is T. What is the mass of the object? The picture shows that the object is in the first...

Hi all, A roller-coaster train is upside down when it is at the top of a circular vertical structure which is 20 m high. In order to get to the top without falling out, the velocity of the roller-coaster train at the top of the circle has to be more than a 25 m s-1 b 14 m s-1 c 9.9 m s-1 d zero...

Here with a question, and I'm a bit crunched for time. I'm also here to learn, too. A basketball player, standing near the basket to grab a rebound, jumps 76.0 cm vertically. How much total time does the player spend (a) in the top 15.0 cm of this jump and (b) in the bottom 15.0 cm? Does this...

I have a problem that I can't figure out what formula to use. It states: In a football game a kicker attempts a field goal. The ball remains in contact with the kicker's foot for 0.0588 s, during which time it experiences an acceleration of 290 m/s2. The ball is launched at an angle of 48.5 °...

i need to find the expression for the vertical direction of a beam in a cathode ray tube, using: Va - accelerating voltage (between cathode &anode) Vd - deflecting voltage ly - effective length of deflecting plates L - distance from end of plates to the screen d...

Well, this is really confusing me. I am suppose to be graphing a given situation into a v(t) vertical velocity graph. The following occurs in 6 seconds (6 points on the graph): Starting at y = 0 m, a stone is thrown straight up on the edge of a cliff until it reaches its maximum height at 2...

Hello all, I've been having some problems regarding the fall of an object in the vertical direction that has air drag which varies quadratically with speed. The problem is as shown: A gun is fired straight up. Assuming that the air drag on the bullet varies quadratically with speed. Show...

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...

I have my physics exams on Friday so was just revising some of the stuff I covered earlier in the year. I got this question: "A ball is thrown vertically upwards with a speed 10ms^-1 from a point 2m above horizontal ground. Calculate the length of time for which the ball is 3m or more above...