Height Definition and 1000 Threads

Homework Statement This homework isn't for a course. There is a book on hockey physics with a section discussing puck drop below intended target. When I use the book's formula modified for drag and lift, it seems to show that a 100 mph shot, taken from 30 feet from the net, can not hit the...

Homework Statement Determine from the left graph the speed at t1. Answer: Draw the tangent (right graph) at t1 and determine the slope. v = 1.4/0.30 = 4.7 m/s 2. The attempt at a solution The slope is (Y2-Y1)/(X2-X1). t1 coordinates are (0.24-0.25, 0). In order to get the answer I should...

G’day physics forum This is a purely hypothetical question and my knowledge of physics is rather limited so I’ve no idea if answering it is even possible however here goes: Imagine a 30cm long timber stick approximately 3mm in diameter that has been placed vertically in an inverted pyramid or...

Homework Statement A 200 kg weather rocket is loaded with 100 kg of fuel and fired straight up. It accelerates upward at 30 m/s^2 for 30s, then runs out of fuel. Ignore any air resistance effects. What is the rocket’s maximum altitude? Homework Equations Δx=V0t+(1/2)at2 V=V0+at 2aΔx=V2-V02...

Homework Statement A ball is thrown straight up from the edge of the roof of a building. A second ball is dropped from the roof 1.00s later. A) If the height of the building is 20.0m, what must the initial speed of the first ball be if both are to hit the ground at the same time? B)...

Homework Statement Jason is practicing his tennis stroke by hitting balls against a wall. The ball leaves his racquet at a height of 43 cm above the ground at an angle of 80° with respect to the vertical. The speed of the ball as it leaves the racquet is 25 m/s and it must travel a distance of...

Homework Statement You throw one ball vertically (V0= 15m/s) on top of a 100m tower. Two seconds later you release another ball from rest from the same tower. Create a motion equation for both balls At what moment do they pass each other? At what height? Homework Equations s=vt+1/2at^2 The...

Homework Statement For part aiii), the mark scheme states "Use of set squares to indicate height". I know what are set squares, but how does it aid to determine the rebound height, h? I thought set squares are to ensure two objects are perpendicular to one another? How does it help in...

I have seen youtube videos where two balls of the same size and of different masses are dropped from the same height and they hit the ground at the same time. I understand why this is so: the increase in the mass of a body increases the force of gravity acting on the body, but also decreases...

Homework Statement Two vertical tanks have their vertices connected by a short horizontal pipe. One tank initially full of water has an altitude of 1.8 meters and a diameter of base 2.2 meters. The other tank initially empty has an altitude 2.7 meters and a diameter of a base 2.4 meters. If the...

Homework Statement : [/B]I'm curious to know why and how one would account for the force of a falling object dropped from a height. If I apply Newton's 2nd Law, force is only dependent on acceleration. So in a straight vertical drop, this acceleration is only gravity. But is it not that a...

This question was posted on Khan Academy. I attempted it after watching all of their great Work and Energy videos, but the way they arrived at the answer was way above my skill level even after reviewing the videos a number of times. Here is the question: What is the minimum height h of a slope...

Greetings, in my total distraction of designing the ultimate Off-road/Overland vehicle, I've been thinking about the following matter: Is it possible that a vehicle can be raised/lowered by pumping/removing extra oil into the shock absorber? And if so, would it affect the ride? Could it be...

Homework Statement A shell is shot with an initial velocity http://edugen.wileyplus.com/edugen/shared/assignment/test/session.quest2529559entrance1_N10030.mml?size=14&ver=1436312588112 of 17 m/s, at an angle of θ0 = 63° with the horizontal. At the top of the trajectory, the shell explodes into...

I'm following Professor Ramamurti Shankar's video lecture series for Fundamentals of Physics I on Open Yale and I'm hung up on the last question on the second problem set, of which there is no mention on the solution set. http://oyc.yale.edu/physics/phys-200/lecture-4 The question asks, "Show...

I do not know much about computers too (not really true but I am not really up to date), I do not know if I am doing what I am supposed to, here is my first simple question: Two connected pipes, equal diameter (internal) 100 mm, same height (2200 mm), I have water in one pipe at 2000 mm, in the...

Hello dear physics masters on earth, I am very grateful to be priviliged to ask you a question regarding electric fields and potential of a single-cpin helix. It is portrayed as below. It is a line of uniform charge, and 1-turn helix with radius R and height H. I have came to ugly answers, and...

H=16t-1.86t^2 is the height formula. The ball was thrown 16 m/s. I derived 16-3.72a. When will the rock hit the surface. It hits the surface 8.6 seconds. What velocity does the rock hit the surface? H=0.0344 then the velocity is 15.87 m/s? This is what I chose. [-4.-2) (-2,2) [2,4) (4,6) (6,8)

Hello, 1. Homework Statement A spherical continuous ball is sliding with a constant velocity v along a frictionless lane. Thereafter it enters an inclined surface (the angle between the surface and the horizontal plane is α) with the coefficient of friction µ between the ball and the surface...

Homework Statement A 48 gram dart is shot vertically upwards from a catapult with a spring constant of 350 N/m. The catapult is initially stretched from the equilibrium point by 21 cm. What is the height above the starting point reached by the dart?Homework Equations KE=PE, rearranging to find...

If a projectile shot from the ground were shot at a target located at a specified height above the ground, and would hit the target, is there a known formula to find the projectile’s height on its trajectory a specified distance (measured along the flat ground) from the target’s base or from the...

Suppose I have already found the surface normal vectors to a set of points (x,y), how do I compute the surface height z(x,y)? Basically what I have are the normal vectors at each point (x,y) on a square grid. Then I calculate the vectors u = (x+1,y,z(x+1,y)) - (x,y,z(x,y)) and v =...

Homework Statement A stone thrown horizontally from the top of a vertical cliff with velocity 15 m s-1 is observed to strike the (horizontal) ground at a distance of 45 m from the base of the cliff. What is (a) the height of the cliff, (b) the angle the path of the stone makes with the ground...

Homework Statement There was a question in which an object was released upwards from Earth with a velocity of ## 2\sqrt {gR}##. Using conservation of energy I found that the speed of the body in the orbit was ## \sqrt {2gR} ## Everything's fine till now. But then I wanted to find the height at...

Is it possible to find the vertical height of a jump using ground reaction force, mass, and time? I might be wrong, but I think my steps would be to find the impulse, then velocity, then somehow get the vertical height with that..so far I have change in velocities using FΔt / m = ΔV. From here I...

Homework Statement I have always learned (and read) that an increase in the number of bits causes the height of the 'step' on the graph to decrease. I tried to think about it but cannot come up with a proper explanation for this. THe books I read do not explain why? Can someone please explain...

Homework Statement Earth actually has an electric field of 1.0 x 10^2 N/C at its surface pointing toward the center. (b) Compare Earth's electric field and gravitational field in terms of i) direction ii) shape iii) how it changes as height increases. c) What is the largest mass that can be...

Homework Statement A ball (m=0.7kg) is dropped from a height (h=30m). The air resistance force is given by the formula F=kv^2 where k=0.0228 and v is the ball's speed. The ball bounces after a perfectly elastic collision. Calculate the maximum height the ball reaches after the collision...

Hi There, Can someone tell me if I'm standing 1600m from an object that is approx. 38m high then what will my perceived height of the object be? Also will this remain the same if I am in an elevated position above the height of the object? Thanks!

Hello all! I am prepping for my finals and going over some work I had problems with before. This one I am still struggling with finding for some reason. Any help would be appreciated! So here is the question: A stone is thrown horizontally with an initial speed of 20 m/s from the edge of a...

I am trying to establish a mathematical relationship between heights h1 and h2 (please refer to figure attached) for a manometer whose RHS channel is the shape of a triangle (defined by a base length and the angle theta). I want to be able to calculate the heights h1 and h2 for a given change to...

Formula for time of flight in projectile motion is 2usin theta/g but I think it is only applicable for when object is launched from ground i.e in the case below But when it is launched from certain height this formula is no longer in use.

Homework Statement 800L/h rated pump 12.6mm outflow pipe. Static head height 1.10m There seem to be no undue turbulence in the flow. Environmental pressure is just atmospheric (1bar) 2. Homework Equations Unknown The Attempt at a Solution I have done the physical experiments which is how...

Homework Statement Upthrow simulation Conditions: initial velocity v=10m/s, initial height h=0m when t=0. Gravity acceleration g=10m/s2 . Using Simulink to simulate the variation of height with time when t≥0. Homework Equations I figured that the governing equation should be: Height =...

Homework Statement :There is a wedge of mass kept on smooth surface. M and block of mass m is sliding in the depression of the wedge.And there is wall in left of the wedge.At which instant velocity of the wedge will be maximum?(surface of contact between wedge and block is smooth) [/B]...

Homework Statement Find the coordinates of the vector of the height of the parallelogram formed by vectors a={1, 2, 1} and b={2, -1, 0} Homework Equations A=|axb|, A=|a|*h The Attempt at a Solution I can find the intensity of the vector h i.e the length of the height, but not its vector. I...

Homework Statement A vertical mast stands on the north bank of a river with straight parallel banks running from east to west. The angle of elevation of the top of the mast is α when measured from a point A on the south bank distant 3a to the east of the mast and β when measured from another...

In the photo of a container ship cargo seems stacked 12 high. I do know that there's lateral supports etc. that are not visible in the figure, yet the vertical load, isn't that transferred downwards to the bottom container? Or is there some way to support the stack at an intermediate point so...

Homework Statement One car (m=80.0 kg) tracks through the roller coaster in the following diagram. As it passes point A, it has a speed of 50.0 cm/s. a) Determine the speed at points B, C, and E b) If the speed at point D is _______, determine it's height (ignore friction) Homework...

Hello everyone, I am a just now starting to study physics and I am quite the newbie, but I am loving it! I am not doing this for school, I study as a hobby in my spare time, but I imagine this is the right place to post this exercise anyway! Here it is: We have a rock dropped from a cliff that...

Homework Statement Homework Equations 1/2 mv^2 = mgh The Attempt at a Solution first, a side question, if p = mv, can't we just place p into 1/2 mv^2 so it becomes 1/2 p^2? anyway, on to the question, at the point where the cube falls off, the Fnormal should just about equal 0, correct? is...

1. The problem: I need to find the height and horizontal distance reached by a projectile given only the vertical and horizontal velocities. Vv=120m/s Vh= 30m/s this is for an algebra based physics class, I'm very new to this stuff.Homework Equations : V=at+Vo X=1\2at^2 + Vo + Xo...

Homework Statement Homework Equations V = (1/3) * A * H [Volume of Pyramid] The Attempt at a Solution The first thing I did was to calculate the height of pyramid from the volume formula. I got a perpendicular height of 15. I'm not sure where to go from there. I'm under the impression...

Homework Statement m2=3kg, m1=? the diagram has been attached Homework Equations I know that we find counterweights by equating equation mass x distance frm pivot but how do we find if it is at different height The Attempt at a Solution Is it m1yh1=m2xh2 is counterweight at all dependent...

Homework Statement A 74.4 kg person falls straight down from a 1.96 m height (measured from his feet) and lands with weight distributed equally on both feet. To soften the blow, he bends his knees so that it takes 0.906 s for him to stop once his feet touch the ground. What constant force does...

In the above figure, a small weight is placed at 2 cm (0.02 m) from the center of the rectangular prism. Let's call the mass of this small weight (M1) and the mass of the entire body including the small weight (M) Given the dimensions above, I want to know how to calculate the height of center...

You live in the building on the left in the drawing, and a friend lives in the other building. The two of you are having a discussion about the heights of the buildings, and your friend claims that his building is half again as tall as yours. To resolve the issue you climb to the roof of your...

Hi Guys, I am new to this forum and interested in physics/Maths. Need your help with one of the problem I am trying to solve. The problem: Someone needs to build a 51 feet tall pole (usual shape of long lamp posts, thick at the bottom and thin at the top). but they want to make this pole such...

Homework Statement What equation is needed to calculate the height of a spherical cap with a fixed volume and radius? Homework Equations V=πh/6 (3a^2 + h^2) Where V = volume, h is cap height, a is cap radius The Attempt at a Solution I have tried to separate the h out and got as far as...

Homework Statement A block of mass 250 g is kept on a vertical spring with spring constant 100N/m fixed from below. The spring is now compressed to have a length 10 cm shorter than its natural length and is released. How high does the block rise?g = 10m/s Homework Equations E=½kx² and other...