Projectile motion Definition and 1000 Threads

A vertically moving object projectile reaches a maximum height of 50 meters above its starting position What is the projectiles initial speed? What is the height above the starting point at 3.3 seconds?

http://www.youtube.com/watch?v=_EU-raX_40Q&feature=relmfu This link demonstrates the modelling of projectile motion with drag. I was just wondering if anyone can help me find the downloadable link he mentions at 5:23

In Hamilton Jacobi Equation (Projectile in two dimentions [x,y]), Isn't it correct that x is a cyclical coordinate?

I'm trying to understand the motion of projectile motion under the influence of air resistance. A website such as this details the necessary equations available to approximate this model: http://claymore.engineer.gvsu.edu/~michels/index_files/Golf%20Ball%20Paper%20Final%20draft.pdf However, i...

Homework Statement Need Help I have been trying to solve this problem for a while now. I know the quadratic formula has to be used in order to solve this problem but I am having trouble getting started. Question A soccer ball is kicked from the ground level at an angle, such that the wall is...

Can someone tell me how to do this problem? I know 16. is A, 17 is E? 3rd pick is of what i have done not even sure if right.

Homework Statement A basketball shoots a ball at an angle of 55° which is 4.3m away( horizontal dist). If the ball is released from a height of 2.1m and lands in the hoop, which is 3m high. Calculate the initial speed of the ball for this shot to be successful. Homework Equations initial...

Homework Statement A boy standing on the top of a building 40m high throws a ball directly aiming to his friend standing on the ground 30m away from the base of the building. If the projection velocity is 20m/s. Find how short will the ball fall from his friend. Homework Equations...

Projectile Motion -- baseball popup Homework Statement A baseball is popped up, remaining aloft for 6.3 s before being caught at a horizontal distance of 83 m from the starting point. What was the launch angle? Homework Equations vx = vcostheta vy = vcostheta The Attempt at a...

A ball A is released from rest at a height of h and another ball B is provided with a horizontal force at the same height h. Both the balls fall to the ground. Which ball will reach the ground first? Doesn't ball A reach the ground first because the ball B is applied with a horizontal force...

Homework Statement A toy rifle shoots a spring of mass 0.008kg and with a spring constant of 350 N/m. You wish to hit a target horizontally a distance of 15m away by pointing the rifle 45o above the horizontal. How far should you extend the spring in order to reach the target? Homework...

Hey everyone, i am wondering about projectile motion and wind currents. e.g. let's say that i throw a paper airplane from either: 1 - an angle e.g. 30 or 70 degrees elevation/de-elevation 2 - no angle and the airplane flies through the air until it hits the ground. What...

1. A soccer player kicks a ball at an angle of 50° above the horizontal. The player is 10.0 m from the base of a rectangular building that is 5.0 m high (with a flat roof). The roof is 10.0 m wide. The ball is kicked with an initial speed of 15.0 m/s. a.Show that the ball will clear the front...

I need some help explaining these concepts 1. Suppose a tank is able to point its barrel up at an angle of 90o. If the tank is in motion and fires a shell straight up, where will the shell land if the tank maintains a constant motion. (don't consider any air resistance) a) in front of the...

Homework Statement Hi guys, I'm trying to start from scratch on figuring out the projectile motion problem. But I think I've hit a roadblock. I am trying to solve a problem where I gave myself initial velocity and how far the object travels, but I can't seem to find a way to solve this without...

I have no idea from where to start and what to do. Someone to help me? Thanks

Hi guys, Doing a projectile motion question, I think I know how to do it but I can't get the answer it wants me to. Anyways: A tall building stands on level ground.The nozzle of a water sprinkler is positioned at a point P on the ground at a distance d from a wall of the building. Water...

Hey guys, I'm not great at physics and my brain sometimes just doesn't get the sort of "implied" aspects of a problem. So I could use some help with an easy question. In projectile motion, there are certain constants given particular circumstances, right? I have to find the height of a...

Hey guys, I am in the process of writing a program for pmotion with air resistance that is proportional to the velocity squared and I've hit a stump. In my program it simulates the path of the ball by changing the time and putting it into the equation and plotting it on a graph. My problem is...

I am having difficulties with this question as no height for the crater is given please help! :) Homework Statement AN astronaut is speeding over a level stretch of the Moon's surface at 12m/s in her small lunar rover. She drives over the edge of a crater, whose surface slopes downwards at an...

Here is a spreadsheet I made to solve projectile motion problems. It uses only euclidean geometry to solve for the answers, but it gives the answers as slopes, not angles. All variables entered also must be in slopes and not angles. I added a section that does the conversion between the two...

Okay, I read that in the case of no air-resistance, projectile motion is symmetric; that the initial velocity will equal the final velocity, in magnitude; and that a projectile traveling upwards, achieving a zero velocity of the vertical component, will have to fall the same horizontal distance...

Homework Statement A basketball is thrown from a height of 2.8m above the ground and goes through a basketball ring that is 3.3m above the ground. If the release velocity was 5.5 m/s at an angle of 54 degrees upwards from the horizontal, calculate the horizontal displacement the ball will...

Hi all! I just wanted to confirm whether or not the working I did for this question is wrong or right. Here is the question: An airplane is dropping an ad package in a remote area. The plane is moving horizontally at speed Vo and the package lands a horizontal distance L from where it was...

Homework Statement Hey, For an assignment I need to derive the optimal angle for maximum range (derive Equation 2 below). I know how to derive equation 1 but I need to derive the second equation so I can substitute h = 0, and h = 1, into it, to show the optimal angle for maximum range for...

i don't know how this works...when a body is projected at an angle "theta" with the horizontal above a height 'h'...what is its maximum height and maximum range?should i just treat it as two separate motions or is there another way to do it...i can solve if it is just a parabolic projection from...

My high school physics textbook says that the speed at which a ball leaves your hand (when thrown upwards) is the same as the speed at which you catch it (if you don't move your hand). That means that the time for the ball's upwards movement is the same as for its downwards movement. Why is this?

For my grade 12 physics class, we need to build a roller coaster. We are given a marble weighing 5 grams and it must be projected at the end of the track. It needs to land 0.5 m at a target when it is projected. Since the coaster is made entirely by myself the ramp in which it will be projected...

Homework Statement A boy kicks a ball into the air. It takes 4.3 seconds to land 41.1 meters from his position to the right. What is the launch velocity and launch angle of the ball? Ignore air resistance. Δx = 41.1 m t = 4.3 s a = -9.8 m/s2Homework Equations dx = vxt vfy = v0y + at The...

Homework Statement Okey, so the problem started with a ball in circular motion on a table (xy-plane, seen from above). Eventually the rope that held the ball snapped and the ball continued on (no friction/air resistance) with constant velocity in x-direction. Gravity working in negative...

1. Homework Statement A soccer player running at 6.8 m/s kicks a soccer ball straight out in front of her so that it travels with an initial velocity of 22m/s at an angle of 50° with respect to the horizontal. If the soccer player continues to run at 6.68 m/s in the same direction that the...

1. Homework Statement A soccer ball is kicked at 38.0° with respect to the horizontal and travels 64.0m before striking the ground. a) what is its initial velocity? b) how long was it in the air? 2. Homework Equations dv=1/2*at2 dh=Vh*Δt Kinetic equation d=Vi*t+ 1/2*at2...

1. Homework Statement A baseball is hit at a point 1.00m above homeplate. The baseball is given an initial velocity of 35.0m/s at an angle of 45.0° with respect to the horizontal. If the baseball is traveling towards the outfield fence which is 4.0m high and 120m away, will the baseball clear...

Homework Statement Jaime is outside playing with her dog, Skip. She throws a tennis ball at an angle of 60° with an initial speed of 10.2m/s and from a height of 196cm. If Skip was standing beside her when she threw the ball, how far would Skip have to run in order to catch the ball just the...

Homework Statement A baseball is hit at a point 1.00m above homeplate. The baseball is given an initial velocity of 35.0m/s at an angle of 45.0° with respect to the horizontal. If the baseball is traveling towards the outfield fence which is 4.0m high and 120m away, will the baseball clear...

Homework Statement A soccer ball is kicked at 38.0° with respect to the horizontal and travels 64.0m before striking the ground. a) what is its initial velocity? b) how long was it in the air? Homework Equations dv=1/2*at2 dh=Vh*Δt Kinetic equation d=Vi*t+ 1/2*at2 dh=-V2*sin2θ /g...

Homework Statement Tony has a tendency to drop his bowling ball on the floor at the completion of his follow-through swing. Tony let's the ball go when the ball is 0.28m above the floor. If the ball travels a horizontal distance of 1.80m before you hear a "thud", with what velocity did Tony...

Homework Statement A swimmer moving at 1.80m/s, dives off a pier and hits the water 0.80m from the edge of the pier. How high is the pier above the water? Homework Equations dv=1/2*at2 dh=Vh*Δt a=9.8 The Attempt at a Solution dh=0.80m Vh=1.80m/s dv=? t=? First started...

I need some help doing very basic mathematical analysis (what would be expected of a Calculus 1 and current Physics 1 student) for my project about tank projectiles, anything to calculate something about their air resistance/air drag, yet everything I have found has either been too simple (drag...

I had recently received an exam back rom my kinematics unit in my physics course, this is the only question that I answered and was incorrect. I was wondering if someone could assist me on what steps I am missing. The correct answer is 3.2m, but I can't figure out how to get to it. A ball...

Homework Statement A ball player hits a home run, and the baseball just clears a wall 21.0 m high located 130.0 m from home plate. The ball is hit at an angle of 35 degrees to the horizontal, and air resistance is negligible. Assume the ball is hit at a height of 1.0 m above the ground. a...

Homework Statement Hi guys, I am not one to ask for help but i missed ALOT of school because I got sick and I was wondering if anyone could solve three problems for me and help me out! Thanks in advance ! Problem 1- A plane is dropping a supply of coconuts to survivors of the USS Minnow, who...

1. A projectile motion is fired horizontally at 150ms-1 from the top of a 196m high cliff. Calculate its velocity on hitting the ground. 2. Okay so I've already discovered its time of flight t = 6.32s and its range Δx = 948m. Other figures are Δy= 196m, ay= -9.8ms-1, ux=150ms-1, Vy=...

Hey everyone! I have been asked to find an equation with the subject of V (initial speed) with only the information given, angle above horizontal, range, and initial height above ground. I did attempt this myself and got the formula: v = initial speed θ = initial angle s = range (total) h =...

Homework Statement I'm doing this experiment in physics laboratory (I) about projectile motion and I'm concerned about some of the results (range) I'm getting. I'm using spherical projectiles about 3.0 cm wide (diameter). Here's the thing, with the launch angle from 10 to 20 (thus, from...

Homework Statement A person standing on the top of a hemispherical rock of radius R kicks a ball (initially at rest on the top of the rock) to give it horizontal velocity v_i What must be it's minimum initial speed if the ball is never to hit the rock after it is kicked? Homework...

Homework Statement a man throws a stone vertically upward with initial speed of 20 m/s from a building with height 54 m a)how long does the stone take to reach 40 m/s b)what is its velocity before it reaches the ground c) what is the magnitude of its acceleration at its maximum height...

The question: An object has a Velocity V1 and an angle A (Alpha) initially. Later in its path, this same object has an Angle B (Beta) find the time elapsed from point A to point B Okay so i have an answer.. i just need some one to tell me if what I'm doing is correct./answer is correct...

Homework Statement A package of supplies is dropped from a plane and one second later a second package is dropped. Neglecting air resistance, the distance between the falling packages will: A) Be constant B) decrease C) increase D) depend on their weight Homework Equations Sv=1/2 av t^2 The...