Projectile Definition and 1000 Threads

Homework Statement A particle is projected with a speed of 98 m s−1 at an angle A to the horizontal. The range of the particle is 940·8 m. Find (i) the two values of A The Attempt at a Solution U = 98cosAi + 98sinAj i direction s = ut 940.8 = 98cosAt j direction s = ut...

Homework Statement A projectile was fired across level ground at an initial angle of 43.00 degrees above the horizontal. During its flight, it reached a maximum height of 2974 metres. What was the initial speed of this projectile? Homework Equations I assume that the correct equation...

Homework Statement A rock dropped from a cliff covers one-third of its total distance to the ground in the last second of its fall. Air resistance is negligible. How high is the cliff? Homework Equations v = v0 + at2 h = v0t + 0.5at2 v2 = v02 + 2ahh = distance in this case The Attempt at a...

Suppose you know only these three things about a launched projectile: - Initial launch velocity (magnitude only, not direction) - Maximum height reached - Horizontal distance traveled before hitting the ground Is it possible to find the initial height, launch angle, and airtime of this...

Hi everyone, I'm trying to design a formula that determines the launch velocity, launch angle, and time spent in the air for a projectile if only the initial launch height, maximum height reached, and total horizontal distance traveled before the projectile hits the ground are known. It's not...

Why does a bullet fired horizontal and bullet dropped vertically downward, land at the same time? Shouldn't the object thrown downward fall sooner as it has a shorter distance to cover even though gravity pulls both of the down at the same rate? Does it have to do anything with the fact that...

First of all this is probably the only time I will be on this forum. At first this seems a no brainer. But I am a weekend survivalist and I made a sling that can sling rock a little more then 1" in diameter 120 yards at an angle of about 50-55 degrees. After some research the type of rock I...

Homework Statement Newt needs to melt some ice, so he fires a test projectile (0.025 kg) at 30.0 degrees C at a speed of 240 m/s into a large block of ice at 0 degrees C, in which it becomes embedded (comes to rest). Approximately what mass of ice melts? (i.e. ignore the heat lost by the...

Finding the total distance a jaguar has jumped from a 30° angle at 3.33m/s. I've split the jump into horiz./vert. components: Vertical: v sin(θ) = 3.33sin(30) = 1.67 ms-1 Horizontal: v cos(θ) = 3.33cos(30) = 2.88 ms-1 I am just unsure as to how to find the time taken to reach maximum height...

Hello everyone, I was doing some experiment using a spring compressed gun, that shoots up ball beraings. I made it using a desoldering pump and a PVC pipe,its quite small. ok, so I set it in 45° angles for maximum range. A desoldering pump has a spring inside, when you push down on top the...

Objective questions regarding "projectile motion - 2 dimension". Homework Statement There are 2 mini problems : 1. If t1 and t2 be the times of flight from A to B and "θ" be the angle of inclination of AB to the horizontal , then t12 + 2t1t2sinθ + t22 is (A.) independent of θ (B.)...

Thought I was done but not the case... Homework Statement Alright so as stated a couple days ago... "projectile is shot from the edge of a cliff 125 m above the ground @ an initial speed of 65 m/s at an angle of 37° with the horizontal from the cliff." ---- As helped earlier I have...

Homework Statement "A slingshot fires a stone horizontally from a tower 32 metres high, and it lands 135 metres from the foot of the tower. What was the speed at which it left the slingshot?" Verticle Height = 32m Horizontal Distance = 135m The Attempt at a Solution I first calculated...

Homework Statement Problem Number 1: a ball thrown into the air from the ground reaches a maximum height of 50meters and 200meters horizontally. Find the magnitude and direction. Problem Number 2: a movie stunt drive on a motorcycle speeds horizontally of a 50meter high cliff. How fast must...

Homework Statement A football player punts the football so that it will have a time of flight = 4.5s and land 45.7m away. The ball leaves the player's foot 1.52 m above ground. What is initial velocity? (Magnitude and direction) Homework Equations x-x_0 = v_0 * cosθ * t y-y_0 =...

Homework Statement A projectile is fired from a cliff 125m off the ground at 37° from the horizontal at 65 m/s. How long will it take to hit the ground? Homework Equations y= yo+(Vyo)(t) - 1/2(g)(t^2) quadratic formula The Attempt at a Solution substituting in equation...

[SOVLED] Angular speed of rod after projectile collides into it Homework Statement Homework Equations L = r x p Iparallel = ICM + md2 The Attempt at a Solution L = r x p = mvir = mvid/2 mvi(d/2) = (Iparallel + md2)ω mvi(d/2) = (1/12M(d/2)^2 + m(d/2)^2)ω Plugging and solving...

Homework Statement This is a problem about an aircraft flying above a cannon which is capable of firing in any direction. The plane's height, velocity and the speed of the projectile fired by the cannon are given (I am not trying to get help in solving the problem, so the numbers are not...

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...

Here's a equation of a projectile thrown in a parabolic path : y=xtanθ - gx2/2u2cos2θ where x is the corresponding x - coordinate or the range of a projectile at a point , y is the corresponding y - coordinate or the height of projectile at point, θ is the angle made with the horizontal...

Hello guys, how are you? Homework Statement An uniform solid sphere, that has 20mm of diameter and 8.4g of mass, its release at a inclined plane with 22cm of lenght. The inclined plane 'ends' in a table in which the ball starts to move horizontally. After leaving the table, that has 92cm of...

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 am working on creating a mid size trebuchet with a projectile arm length of 3 feet. The counterweight is about 3500 grams, with the projectile being 60 grams. I know that the ratio of the projectile arm length to the counterweight arm length changes depending on several factors, most...

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...

Homework Statement I have a physics lad research that's due tomorrow, the overall process is to work out how much potential energy will be stored in a bow, and the efficiency of the bow. First of all, I have a graph, with the plots Force Vs. Displacement (of a weight 'm' on a string). We...

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...

Alright, I am trying to work out some equations on a project to determine if fictional instances of physics are possible or not. In my case, I am seeing how a person travels if they are thrown from a jet that is traveling vertically (don't ask). I have completed the equations to solve how far...

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...

http://dl.dropbox.com/u/33103477/gravity.png I have worked out the first two bits. (So you can assume that I have that) But I can't figure out how to work out the maximum height reached. I know there I can equal the KE and the PE to work out max height, but that doesn't look like it'll...

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...

In the mark scheme they have done s/u = t, and then used this t value (along with the vertical component of velocity and g) to calculate the vertical displacement s.. I am confused why they used the same t value to progress with? This t value represents the time taken to travel the 0.4 m...

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...

Homework Statement I need to calculate the initial velocity required to launch a projectile at a given angle from point A to point B. The only force acting on the projectile after launch will be gravity – zero air resistance. The projectile is launched within a simulated, virtual environment...