Height Definition and 1000 Threads

Homework Statement Suppose you drop a ball from rest out of a window that is at height H above the ground, and suppose the ball hits the ground with speed S. At the instant that you release the ball, your buddy throws a ball straight up from the ground level with the same speed S. Show that the...

Homework Statement A 15.0 g plastic water rocket containing 40.0 g of water and compressed air is strung on a very low friction horizontal wire. When fired, compressed air forces the water from the rocket in 0.600 s at an average exit velocity of 4.05 m/s [E]. Based on the information in the...

Can pull up exercise (at a younger age, say, before 15 years old) increase height? My guess is yes, since weight lifting could decrease height (Or that is another myth?) If yes, by how much?

Hello all: I have a question. I'm looking at this problem: Homework Statement A flower pot falls past your window. The pot is visible for a time t, and the vertical length of your window is L_w. Take down to be the positive direction, so that downward velocities are positive and the...

Homework Statement An object falls freely, moving 60m in the last 2 seconds. Find the height at which it was dropped. [/B]Homework Equations Vf = 1/2(gt^2) + Vo(t)+ Yo g= 9.8m/s^2[/B]The Attempt at a Solution the object accelerates at 9.8m/s^2 . and the velocity would be 30m/s. (60 divided...

Hi, I was reading about bicycles the other day and a question popped up in my head: Does the rider's weight and height affect the speed of the cycle? I have been researching extensively about it but I cannot find any formulae that can be used to measure the effectiveness of the height and...

Homework Statement Below is screen shot of the problem. My friends book was ripped so some of the problem was cut off. Using the diagram I need to find d. The answer is supposed to be 7.42x10^4m. Below the problem is my attempt at the solution. Can someone tell me where I went wrong. As you can...

Homework Statement So the problem I have is calculating the gravity acceleration on the height of 12740km or 2 times the radial distance of Earth. The problem is relatively simple and I think that I have it right but the result doesn't match with the book. ## g_0=9,81 \frac {m}{s^2} ##...

Homework Statement A stone weighing 1/2 lb is thrown upward from an initial height of 5 ft with an initial speed of 32 ft/s. Air resistance is proportional to speed, with k=1/128 lb-s/ft. Find the maximum height attained by the stone. Homework Equations None. The Attempt at a Solution Here's...

Hi everybody! I'm struggling with a physics problem I though I had solved, but as it is turning out recently, I probably hadn't. The problem might actually be pretty easy, just me being unable to solve properly. All of you are familiar with inverted pendulum. Now, imagine an inverted pendulum...

Homework Statement A box is on top of a slope. The slope has NO FRICTION. V0 = 0 m/s, V = 4m/s. MASS IS UNKNOWN What is the height of the slope? Homework Equations Equation for energy (i think)The Attempt at a Solution I attempted to find the accelleration, but I do not know what the...

Homework Statement The problem states to calculate the height at which the gravity acceleration is 5x smaller than on the surface of the earth. So g=9,81 m/s^2 R=6370km M=6x10^24 gamma(don't know how to put it :P)=6,67x10^-11 Homework Equations g=gamma x M/(R+h)^2 The Attempt at a Solution...

Homework Statement A body is dropped from certain height H. If the ratio of the distances traveled by it in (n-3) seconds to (n-3)rd second is 4:3, find H (take g= 10 m/s²) (answer: 125m) Homework EquationsThe Attempt at a Solution I did this way but I came to a dead end... To find H, s= 1/2...

(constants're ommitted) 1-) M=50, m=5, h=5 then Potential Energy = (50*5)/5 = 50 After increasing height 2-) M=50, m=5, h=10 then Potential Energy = (50*5)/10 = 25 Field strength decreases amount of h^2 so according to formulas potential energy decreases as h increases. But that mustn't be...

Homework Statement An astronaut on PLANET OSKI is standing on a cliff of unknown height H. The astronaut would like to ascertain the gravitational acceleration g0 of PLANET OSKI. In order to determine H and g0, the astronaut performs two experiments: 1) FIrst she leans over the edge of the...

Hello! (Wave) I had a test today , it was given an AVL-tree and I had to find the height of the node with key $k$. That's what I have tried: Height(T,K){ if (T==NULL) return; pointer R; R=LookUp(T,K); int k=height(R); return k; } height(pointer R){ static j=0,l=0; if...

I am having trouble trying to derive the air pressure at a given height. So far, I have considered a 1m^2 patch of area, and the pressure is the weight of all of the air above this patch. So P= \int_R^{\infty}g(x)\rho(x)dx So P= GM\int_R^{\infty}\frac{1}{x^2}\rho(x)dx But then I don't know...

Homework Statement A ball is dropped from one yard and come backs up ##\dfrac{2}{3}## of the way up and then back down. It comes back and ##\dfrac{4}{9}## of the way. It continues this such that the sum of the vertical distance traveled by the ball is is given by the series...

Is the height in the formula the vertical distance from the bottom to the center of gravity of object, or is it just the vertical distance from the bottom to the very top of the object. I mean.. If there is a sphere with mass m and radius r and placed at height h, what is its potential...

Homework Statement An elevator rises at a constant velocity. A marble is dropped from a hole in the elevator at time T_1. It accelerates downward at 9.8 m/s^2 and hits the floor at time T_2. Define the height at time T_1 Homework Equations y=y_0+v_0 t-1/2gt^2 The Attempt at a Solution So this...

It's just a simple question. How does the height effect the other values if the height increases or decreases. What happens when the height increases and what happens when the height decreases?

If I have the velocity an object is moving up (lets make it v here), and the mass (m), how do I calculate the height it bounces to, and by using the efficiency of the ball 60% and gravity as 10 (for simplicity), how do i calculate the original height? Assume there is no wind resistance.

Homework Statement A large tank of water has a 'z-shaped' hose connected to it. The tank is sealed at the top and has compressed air between the water surface and the top. When the water height, h, has the value 3.50m, the absolute pressure p of the compressed air is 4.20x10^5 Pa. Assume that...

This is from question 1 of the F=MA 2012 exam: Consider a dripping faucet, where the faucet is 10 cm above the sink. The time between drops is such that when one drop hits the sink, one is in the air and another is about to drop. At what height above the sink will the drop in the air be right...

Homework Statement How to calculate initial height (h) in an oblique motion? Data: initial velocity (v0) = 10 m/s angle (α) = 45º g = 10 m/s2 Variables: x - position in the x-axis y - position in the y axis r - range...

Homework Statement A 12-kg dog jumps up in the air to catch a ball. The dog's center of mass is normally 0.20 m above the ground, and he is 0.50 m long. The lowest he can get his center of mass is 0.10 m above the ground, and the highest he can get it before he can no longer push against the...

the unit h is referring to height or the Planck constant ze

I need help in understanding how to conduct this experiment. I found this lab report online but it is confusing https://www.google.ae/#q=metacentric+height+experiment http://site.iugaza.edu.ps/mymousa/files/Experiment-2hydraulics-lab-.pdf I am finding it difficult to visualize the...

I'm having a hard time setting up an image of this problem. Can you provide one? Thanks!

1.Small ball with mass m falls from hight h. Find how velocity, acceleration and height depend on time. Air resistance is linear and depends on velocity ##F = kv##. 2. Air resistance ##F=kv## where ##k## is constant. 3. I do not know where to go after ##ma = mg - kv ##.

Homework Statement An object is thrown from the ground into the air at an angle of 30 degrees to the horizontal. If this object reaches a maximum height of 5.75m, at What velocity was it thrown? a= -9.81 m/s h= 5.75 m I know that velocity is the one that I need to solve but I'm kinda finding...

Homework Statement Q.[/B] A body dropped from a height H above the ground strikes an inclined plane at a height h above the ground. As a result of the impact, the velocity of the body becomes horizontal. The body will take the maximum time to reach the ground if : (a) ##h=\frac H4## (b)...

Homework Statement So I am currently in my final year working on my thesis. Below is the details of my thesis topic: Metacentric height (Computational) It is a simple matter to determine whether a body will float in a liquid, it is not so easy to determine the orientation at which the body...

Homework Statement A container has a round hole at the bottom. The diameter of the hole is 0.1 mm. The container is filled with water. The maximum height (in m) up to which whiter can be filled without leakage is h/10. Find h. Surface tension= 75 * 10^-3 N/m Homework Equations Pgh*A=F(of...

Homework Statement A roller-coaster car initially at a position on the track a height h above the ground begins a downward run on a long, steeply sloping track and then goes into a circular loop-the-loop of radius R whose bottom is a distance, d, above the ground in the figure. Ignore friction...

I'm sorry if this isn't astrophysics but I didn't know what else to post on. So I play this game called Kerbal Space Program, and I've recently been trying to calculate the delta v needed to launch my rockets and spaceships from all the planets and moons in the game. I learned how to calculate...

Homework Statement Determine the height h to which liquid should be poured into the cup so that it contacts half the surface area on the inside of the cup. Assume that r=11mm and l= 60mm . Neglect the cup's thickness for the calculation.Homework Equations Surface Area = 2πXL where X is the...

Homework Statement A rocket is being launched along the line y=x from the base of a building, and another rocket is being launched from the top of the building parallel to the bottom rocket. Another rocket is being launched directly upwards away from the building. Find: The height of the...

Homework Statement The figure shows a schematic drawing of an open ended well-type manometer. Attached to one end of the manometer tube is a well (a reservoir with a higher crossectional area compared to that of the tube). The manometer is filled with a fluid with an SG = 2.95. The manometer...

Hello,just seeing if someone can help me on here,i have a rc glider measuring 2200 mm on the ground,when in the air it measures about 35mm. Can the the height be calculated from these measurements.

I've been trying to figure out this problem for hours my whole group and most of the class is stumped. We understand that we need to relate the equations of F=ma, Fd = (Cd*p*v^2*A)/2, Fnet=Fd-Fg. No data is given. The answer is a V=____ equation. Even just an answer to #1 would be very helpful...

Homework Statement A ball is dropped from a height of 5meters a) what is the velocity of the ball when it reaches the ground ? explain Homework Equations velocity = displacement /timeThe Attempt at a Solution the velocity is increasing due the gravitation of Earth (as 9.8m/s) the ball is at a...

Homework Statement A projectile is fired with speed v_0 (velocity subscript zero) at an angle θ from the horizontal as shown in the figure Consider your advice to an artillery officer who has the following problem. From his current position, he must shoot over a hill of height H at a target...

Homework Statement Use energy conservation to answer the following question. A mass is attached to one end of a massless string, the other end of which is attached to a fixed support. The mass swings around in a vertical circle as shown. Assuming that the mass has the minimum speed necessary at...

Homework Statement A falling stone takes 0.33 s to travel past a window 2.2 m tall. From what height above the top of the window did the stone fall? Express your answer using two significant figures. Homework Equations Kinematic Equations ~ X= Vi (time) + .5gt^2 Vf^2 = Vi^2 + 2gxThe Attempt...

Homework Statement If you have a water tower (basically a cup) open to the atmosphere, with a siphon (basically a straw) inside it as shown below: (sorry assume the height h extends to the bottom of the cup instead of only part way - would that change anything though?) Then what is the...

Homework Statement [/B] A stone is dropped from the top of a cliff. The splash it makes when striking the water below is heard 4.0s later. how high is the cliff Homework Equations .5mv^2+mgy = E v = v0 + at v = d/t The Attempt at a Solution The question says after the rock is DROPPED so i...

Homework Statement A baseball is hit directly upward with an initial speed of 37 m/s. Find the velocity of the ball when it is at a height of 47 m. Homework Equations F=ma F=ag The Attempt at a Solution F=(37)(-9.8)=-362.6/47=7.7[/B]

A ball is thrown with an initial speed of v0=39.2m/s vertically to Mars. Its initial height is h=15m from the surface of mars. the acceleration of gravity on Mars is g=3.7m/s^2 (1) what is the maximum height hmax of the ball (2) How long is the ball in the 'atmosphere' (3) What is the speed...

Homework Statement I want to calculate velocity and height at each time interval Time intervals: 1,2,3 (seconds) equilibrium height = 3 meters amplitude = 0.2 angular frequency = 48 rad/s phase shift = 60 Homework Equations y(t) = equiheight + Amplitude*sin(angfre*t +...