Projectile Definition and 1000 Threads

Homework Statement "A projectile is fired horizontally from a gun that is 45.0 m above flat ground, emerging from the gun with a speed of 250 m/s. (a) How long does the projectile remain in the air? (b) At what horizontal distance from the firing point does it strike the ground? (c) What is the...

Homework Statement Two projectiles are fired, one at t = 0 with velocity v01, making an angle θ1 with x-axis, and the other at t = T > 0 with velocity v02 making an angle θ2 with x-axis. Show that if they are to collide in midair the travel interval T between the two firings must be...

Homework Statement A fountain shoots water from a fountain that is 3.5cm from the ground. The water reaches a maximum of height of 11cm from the ground (or 7.5cm from the height of the fountain). The range of the water is 15cm from the fountain once it hits the ground. Find: a) The time the...

Finding the maximum kinetic energy in a simple parabolic projectile motion requires us to find the maximum velocity. I know that the velocity will be maximum at two points, the point of projection and point of return. So there must be two points where the kinetic energy is maximum. But my...

Homework Statement A block of mass m = 2.00 kg is released from rest at h = 0.300 m above the surface of a table, at the top of a θ = 50.0° incline as shown in the figure below. The frictionless incline is fixed on a table of height H = 2.00 m. a. Find a on the incline a=7.51 :) b. Find V(f)...

Homework Statement Homework Equations D=VΔt Vf=Vi+ayΔt Df=Di+VyΔt+(1/2)ayΔt2 The Attempt at a Solution I solved for d using 1/2ayΔt2 and got 10.30m (Solving for d is a question later on in this assignment and i checked it there and it is incorrect...) Then I used Df=Di+VyΔt+(1/2)ayΔt2 but...

Homework Statement A motorcycle daredevil wants to ride up a 50.0m ramp set at a 30.0 θ incline to the ground. It will launch him in the air and he wants to come down so he just misses the last of a number of 1.00 m diameter barrels. If the speed at the instant when he leaves the ramp is 60.0...

Homework Statement a gold ball is hit with an initial velocity of 52m/s at an angle of 50 degrees How long is it in the air Homework Equations Sin=opp/hyp Cos=adj/hyp D=vt+1/2at^2 The Attempt at a Solution First I split the vector into its vertical and horizontal components sin50=x/52...

Homework Statement Protons are projected with an initial speed of v0 = 10^5 m/s into a region in which a uniform electric field E = 800N/C [down] is present. The protons are to hit a target that lies a horizontal distance of 10.0 mm from the point at which the protons are launched. a) find the...

Hello Forum, I am aware that in order to maximize the time of flight, for an object being launched from a certain level and returning to the same level, the launching angle must be theta=90 degrees. To maximize range instead (same level to same level) the angle should be theta=45 degrees (no...

This question is on space and projectiles. It is about comet 67P/ Churyumov-Gerasimenko and the Rosetta/ Philae lander. Question: 67P has a gravitational field strength of 5.2x10^5 N/Kg. After Philae bounced it took 1 hour 50 minutes to reland. Calculate the initial velocity of Philae. Does this...

Homework Statement An object is launched horizontally from the highest peak on the Moon's surface. Calculate (a) the launch speed required so that the object travels completely around the Moon and returns to its original position, and (b) the time required to return to the launch point. Assume...

Homework Statement I saw this in a video about solving projectile motion problems and I was confused, I think I may have seen the same thing in my textbook:The question says: A soccer player on a level playing field kicks a soccer ball with a velocity of 9.4 m/s at an angle of 40 degrees above...

Hey guys building an air cannon for class that shoots a wad of paper from a normal sheet of 8.5/11 paper will be dry. Question is... Is Psi more important or CFM with this light weight projectile? Plan on building from PVC, can do 100psi easy. Plan on using a diaphragm valve with a solenoid for...

Homework Statement You're the new home run hitter for a baseball team. Your job is to hit the ball over a fence D away and H high. For a given angle θ calculate the speed with which the ball must be hit v0 to go over the top of the fence. Homework Equations 1. y = y0+(v0*sinθ)-½gt2 2. x =...

For example, a cosmic electron projectile at 1TeV, is it possible to fly through a nucleus just like a bullet drills through a cake and makes the cake insensible recoil? After drill-trough, the electron may have some deviation from incident direction because the route may not exactly pass the...

Homework Statement Someone throws a ball 1m from the ground at a 30 degree angle to the corner of the room 8m away and elevated by 1m. Find the initial velocity of the ball. Homework Equations s=ut+1/2at^2 The Attempt at a Solution So i broke it up into vector components in order to find the...

Homework Statement A projectile is launched horizontally with an initial velocity v0 from a height h. If it is assumed that there is no air resistance, which of the following expressions represents the vertical trajectory of the projectile? (A) h–gv0^2/2x^2 (B) h–gv0^2x^2 (C) h-gx^2/2v0^2 (D)...

Homework Statement Golf ball struck with a velocity of 66 ft/s. Part a): determine the speed at which the ball hits point B. Part b): determine the time of flight from A to B. Homework Equations For Part b): (Vo)x = Vcos(θ) (Vo)y = Vsin(θ) D = Do + (Vo)x * t Y = Yo...

I'm making a simple railgun. and I'll charge capacitors(330v, 1000uF) for railgun's power source. but I just have a question. the railgun's projectile is about 20g, and rail is about 20cm(height) how can I get the projectile's speed(in end of the rail)? or projectile's kinetic energy? (don't...

Homework Statement A cat leaps over a 1.5m wall with a speed of 15m/s and at an angle of 35 degrees. The cat lands on the edge of a ledge that is 1.5m tall, how far is the ledge from the wall? Homework EquationsThe Attempt at a Solution I used the range equation to find the entire horizontal...

Homework Statement Julie throws a ball to her friend Sarah. The ball leaves Julie's hand a distance 1.5 meters above the ground with an initial speed of 18 m/s at an angle 39 degrees with respect to the horizontal. Sarah catches the ball 1.5 meters above the ground. 5) After catching the...

Homework Statement http://imgur.com/RDMG4Pj Link to drawn out problem^ The ball goes through the hoop NOT at the peak, but rather on it's downward path. It's asking for the total x-displacement, launch angle (theta), and the total flight time. It must me solved WITHOUT using the range...

Homework Statement Is angular momentum of a projectile in projectile motion conserved ?[/B]Homework EquationsThe Attempt at a Solution Gravitional force vector is acting along direction of displacement vector. Thus external torque is 0. Thus angular momentum is conserved throughout projectile...

Homework Statement A projectile is to be launched by a marksman through an opening in a wall which is 40 m away over a flat ground. The lowest part of the opening on the wall is 30 m above the ground and the opening’s gap is 10m high. The mechanism for launching the projectile generates an...

Homework Statement A projectile is thrown on an inclination plane with incline angle phi with an inital velocity V0 on an angle theta. Find the range of the projectile; treat the hypotenuse of the inclined plane as the x-axis. For what value of initial velocity angle is the range maximum, and...

PROBLEM REGARDING PROJECTILE MOTION 1. I have to find the implicit equation for minimum and maximum initial velocity needed in order for water to end up in the reservoir. I have tried solving it by firstly expressing flight time from the equation for range of projectile (time in terms of D and...

Homework Statement A golfer is about to hit a golf ball from a tee to a hole on the green. The tee and the green are at the same level. The golfer hits the ball, projecting it at a speed of 35 m/s 28° to the horizontal. Air resistance is negligible. Calculate: a) the horizontal distance...

Homework Statement Brick is sliding off a roof, starts at the peak of the roof (7.0 m above ground), slides down roof with kinetic friction value of 0.28, very edge of roof is 4.0 m above ground. Where does the brick land on the ground? Please see image - http://imgur.com/wNdtlWD Homework...

I'm trying to write a program to calculate the trajectory of a projectile with air resistance. I've made the following function which calculates the position of the particle based on a given launch angle and initial velocity: def traj_fr(angle, v0): #function that computes...

Homework Statement A bird flew along a helical path r(t)=<5cost,5sint,2t>, at time t=10 second, the bird died instantly. where did it hit the xy-plane ? g=32 ft/s/s. Homework Equations r(t)=(v_0 \cos\theta t) i+(v_0 \sin\theta t - 0.5gt^2 + h_0) j The Attempt at a Solution taking derivative...

I'll admit that I'm not an undergraduate(I'm in high school), but I do have a kinematic question that I'm extremely curious about. I basically would like to ask what affects the motion of a projectile, and make it stray from its path. So if I a projectile(let's use a rocket) is flying downward...

This sounds like a dumb question. I have come to accept projectiles form parabolas but I need someone to explain why they form this shape

Homework Statement Mountaineers are simulating a massive avalanche snowball by using a big Styrofoam ball (m = 75 kg; r = 1.50 m).They give it an initial impulse of 1500 kg m/sto start it rolling down the hill without slipping (no snow sticks to the ball, and ignore air resistance). Near the...

Assuming you could fire a projectile at 10km/s. Polished aluminum, almost solid, same size and shape as an artillery shell. Most people say it would disintegrate due to the friction at sea level. But would it really? I heard someone say it would just ablate some of the aluminum. And that 1700...

Homework Statement Questions: 1. What can be said about the energies of the projectiles launched at different angles? Explain. 2. Will the projectiles launched at different angles hit the ground with the same force or with different forces? Explain.Homework EquationsThe Attempt at a Solution

Homework Statement whats the minimum angles to the vertical(theta) for a projectile(ball) to be realeased with speed v such that at any point of time the distance to the ball is increasing. Homework Equations Sh=vtsin(theta) Sv=vtcos(theta)-0.5gt^2 The Attempt at a Solution so i used...

Hello PFers, I'm trying to make a program in java which process user's position, initial velocity of the projectile and the elevation of the projectile and show the trajectory in GUI. The language is in java. The problem is, the trajectory won't show. It is supposed to show the player's...

Homework Statement A projectile of mass 100g, moving at a speed of 400m/s, collides with a stationary wooden target of mass 1.5kg which is free to move. The projectile enters the wooden target on impact and remains embedded in it. Homework Equations a) calculate the velocity of the target and...

In Matrix, Morpheus shows how to jump. He jumps easily, but Neo falls in his first jump. Morpheus’ jump takes 4 s and Neo’s fall takes 7 s. Distance between the buildings as L and height as h and consider that Neo falls at the middle of the distances, L/2. If both 1 of them know a bit of...

Homework Statement Two projectiles are launched simultaneously from the same point above the flat terrain. The initial speeds of the projectiles are the same. Each projectile’s velocity makes the same angle with the horizontal. However, projectile A is launched above the horizontal and...

Homework Statement A ball is launched at 30 degrees. How far away will it land if dy= 56.2m (height of launch) Homework Equations t=vy/g The Attempt at a Solution t=vy/9.8m/s I can't figure out how to find either vy or t

Homework Statement A projectile of mass m = 50g traveling at v0 = 20m/s hits a block of mass M = 450g. The block rests on a frictionless horizontal surface and is attached to a spring of force constant k = 2000N/m. The projectile ricochets backward off the block with speed v’ = 0.6v0. The...

Homework Statement A projectile is launched from an origin (0cm,0cm) on a tilted plane. The plane makes 30 degrees with the horizontal. The launcher sends the ball with a speed of 0.2m/s. At what angle should the projectile be launched to hit the target at (0.7m,0.6m) location? Assume there...

Homework Statement Calculate the magnitude and direction of the velocity of the rubber duck the second it lands? Homework EquationsThe Attempt at a Solution I'm confused, surely if it has landed then it has no magnitude or direction? as the object is now stationary.

Homework Statement Ms. Bongiorno is competing in the Olympics in the long jump. She jumps 7.59m horizontally and is in the air for 0.72s. a) With what speed did she jump? b) At what angle did she jump? Homework EquationsThe Attempt at a Solution My attempt at the solution is shown below. Can...

This is a really basic problem but the answers I've gotten don't match up with the back of the book. I've been over it several times & can't understand where I'm going wrong - any pointers would be much appreciated! 1. Homework Statement A physics book slides off a horizontal tabletop with a...

Homework Statement In a fireworks display a rocket is launched from the ground with a speed of 18.0m/s and a direction of 51.0 above the horizontal. During the flight, the rocket explodes into two pieces of equal mass. What horizontal distance from the launch point will the center of mass of...

[mod note: post moved into homework forum, so template is absent] G'day, I have an open ended investigation to do for school, and was wanting to do an experiment involving the motion of water from a hose, as this would give me a good parabolic curve to view. I wish to examine two independant...

Hi all. I just recently dropped psychology for physics so this topic as a whole has me stumped and the textbook isn't helping. I'll be using this thread for any questions that arise pertaining to projectile motion (so more than one), if that's cool? Should be really basic. Thanks. 1. Homework...