Projectile Definition and 1000 Threads

Homework Statement A projectile is shot at a hill, the base of which is 320 m away. The projectile is shot at 60° above the horizontal with an initial speed of 79 m/s. The hill can be approximated by a plane sloped at 19° to the horizontal. The equation of the straight line forming the hill is...

Homework Statement We had a lab on projectile motion and one of the questions was this: Use your Vy versus t graph to determine the y-component of the acceleration of the puck. Should this be equal to the acceleration due to gravity (9.8 m/s)? Explain why it is or why it is not. The...

Homework Statement A hammer bro is throwing hammers with a velocity of 1.7 E 1 m/s at 51 degrees down at Mario from a ledge that is 8.5 m tall. Assume that gravitational acceleration in the Mushroom Kingdom is the same as on Earth. Determine how long each hammer in in the air. Homework...

Homework Statement Projectile motion I have an an object that is shot at an angle of 55 degree's. (the velocity listed next to it was 35 m/s, which was not listed as Vo but I think I have to assume it is?) It is launched from the ground. it is meant to land to hit a button that is elevated by...

Homework Statement Two objects are kicked upward at different angles. Object A travels a greater horizontal distance than object B. Both reach the same maximum height. Which of the following statements about the objects are true? You may select more than one. 1.Object A is in the air for a...

Homework Statement The question is in the pic. Homework EquationsThe Attempt at a Solution I answered it B. Still i am not quite sure whether it is B or E. I assumed some numbers, though.

Homework Statement Determine the initial velocity of a projectile that reuturns to launch level 10.0 seconds after it is launched and lands 300.0m away from the launch site. Homework Equations Δx=v0xt Δy=v0yt+1/2gt2 The Attempt at a Solution [/B] 300=v0x(10) v0x=30m/s I don't...

Homework Statement A 60 g ball is tied to the end of a 40-cm-long string and swung in a vertical circle. The center of the circle is 150 cm above the floor. The ball is swung at the minimum speed necessary to make it over the top without the string going slack. If the string is released at the...

Homework Statement A m=77.39 kg person on a bike is riding at v0,b=11.83 m/s. Suddenly, he sees a child running across his path! He applies the brakes that provide a deceleration of a= -4.192 m/s2. His glasses were not attached properly to his face, so they fly away and land on the pavement...

Homework Statement launch angle of θ=41.86°. The distance to the wall is d=11.06 m, and it strikes the wall with speed that is a fraction f=0.925 of the initial speed, while it is still gaining height (i.e., it has not the highest point of the trajectory). What is the initial velocity? Express...

I am trying to answer a question about projectile motion were the change in height is that significant that the gravity cannot be assumed constant.

Homework Statement A catapult launches a rock with an initial velocity of 50m/s at 35 degrees above the horizontal. The rock must clear 3.5m at 10m away in order to make it over a castle wall to get to the enemy. Do the knights succeed? By how much do they clear the wall or miss clearing the...

Homework Statement A ball is kicked with an initial speed of 20m/s at an angle of 50° above the horizontal. What maximum height does the ball reach? Homework Equations Vfx=VicosΘ Δx=VicosΘt Vfy=(VisinΘ)+ay⋅t (Vfy)^2=(VisinΘ)^2+2ay⋅Δy Δy=1/2(Vfy+(VisinΘ))⋅t The Attempt at a Solution I...

Homework Statement A cannon is inclined about the horizontal by an angle of 45° and it launches projectiles with initial velocity of ##v_p=300m/s##. A small airplane moves horizontally with a constant velocity of ##-100m/s##(so it is directed to the cannon) at high of ##500m##. If at ##t=0s##...

In lower-division physics classes, air resistance is usually ignored to make the mathematics of projectile motion easier to understand. When air resistance is included, it's often stated that at lower velocities, air resistance is proportional to the velocity of the object, Fair ∝ kv At...

Homework Statement If a particle moves in X-Y plane with acceleration non zero in X and Y , the particle will not move in a parabolic path True or False ? Homework Equations X = UxT + 1/2(Ax)T^2 Y= UyT + 1/2 (Ay)T^2The Attempt at a Solution The equation of trajectory that i came up with...

Hey guys, I am working on a school project and have fired some water rockets at different angles. I am now trying to compare theoretical results vs experimental results. But I am struggling to produce an accurate mathematical model. I have attached my attempt to this post. It is quite long and...

We have two identical balls sitting at the same height. One of them is released without applying any force (it falls freely) and the other one is given a non-zero horizontal velocity. Which of them will hit the ground first? The force of air resistance is proportional to the square of the...

The volleyball player serves the ball from pt.A w/ an initial Vo at angle theta to the horizontal. If the ball just cleared the net at pt. C and landed on the base at line B. Determine the value of theta. Determine the value of Vo. Determine the time reach to the highest point at the...

Homework Statement Problem: 5. 37 [/B] With reference to the figure below, the projectile is fired with an initial velocity ##v_0=35 m/s ## at θ=23°. Truck is moving along X with constant speed of 15m/s At instant projectile is fired, back of truck is at x=45m Find time for the projectile to...

How do I determine how much drag is required to orient a spinning spherical projectile with a small parachute just before apogee? The projectile is going straight up. The parachute will not be deployed until around 6.5 seconds into flight when the object is traveling at 14.2 m/s. This isn't a...

In projectile motion, we have two components one is x and another is y. x = u cosθ and y = u sinθ But why do I take the' y' component for calculating the 'time of flight' not the 'x' component? y = ut sinθ - 1/2 gt^2, t = 2u sinθ / g

I was in physics class a while ago and my teacher had the trajectory of a projectile on the board. he was marking off points on it, and next to each point, right after he marked it off, he wrote 1/2 next to it, then crossed it off while saying "1/2", then proceeded like that, marking off the...

<< Mentor Note -- thread moved from the New Member Introduction forum because of the general nature of the question >> Hi guys, I'm Liszzy newly join physics group. How are you everyone? I'm doing my Canadian diploma in physics and need help from you guys. I've doubt in Kinematic chapter...

I"ve seen several texts that say something like this: Our equation of motion along x is dvx/dt = -g(vx/vt) Integrating this, we obtain equation 178 at this link (pretty near the top; sorry, but I can't figure out how to put the equation here). It's from FitzPatrick's online notes for...

Homework Statement A cannon can shoot whatever cannons shoot at different angles to the horizon, but with the same initial velocity. At what angle does the cannon shoot to a maximal distance? What would be that angle on the moon? Homework Equations d is the total horizontal distance traveled...

Homework Statement A beach ball is thrown upwards with initial speed v0. The drag force is given by Fd = −mαv for a drag coefficient α and speed v. (a) the height h reached (b) Show that the height may be expressed in terms of the final speed when the ball strikes the ground vf (c)Finally show...

Homework Statement Homework EquationsThe Attempt at a Solution I solved this problem and got the correct answer 108 m . But I had to solve a DE . This question is from a test where we get around 1 minute to solve a problem . I took half an hour to solve it :wideeyed: . It looks like a...

Homework Statement https://www.physicsforums.com/attachments/upload_2018-4-29_12-40-30-png.224871/ Homework EquationsThe Attempt at a Solution 1/2mv^2=10 1/2m(ucos60)^2=10 1/2mu^2/4=10 mu^2=80 what to do now?

Let x = v_0\cos \alpha _0 t and y = y_0 + v_0 \sin \alpha _0 t - \tfrac{1}{2} gt^2, where v_0 is speed at time t = 0, \alpha _0 is the angle between positive x-axis and initial velocity vector (\alpha _0 \in (0, \pi/2)), t time in seconds, y_0 >0 the y coordinate at time t=0, g acceleration...

Hello everyone! Apologies if this is a very repetitive question but I have gone through previous forum posts and am still struggling to understand how to identify which equations are appropriate. In the problem below, I have used the kinematic equation of "v = v(i) + at" but my answer is...

Homework Statement In a practical that we conducted, we were investigating the relationship between Launch height and the range (horizontal distance it travels) of a projectile. We launched a projectile from various heights and measured the horizontal range it traveled before reaching the...

In a projectile motion practical, we had to investigate the relationship between launch of projectile and the range it travels. Increasing the height will obviously increase the range. However, we are trying to understand why it does in a more scientific way. We already know that increasing...

Homework Statement This isn't really a homework problem/question. I am just wondering if it is possible to calculate the vertical distance (dy) when the only given values are those of the horizontal distance (dx) and velocity (v). An example of this projectile-motion problem would be this: A...

Homework Statement A golf ball is struck at ground level. The speed of the golf ball as a function of the time is shown in Fig. 4-36, where t = 0 at the instant the ball is struck. The scaling on the vertical axis is set by ##v_a = 19~m/s## and ##v_b = 31~m/s##. (a) How far does the golf ball...

1. the question is this: a projectile's speed at launch is four times its speed at the top of the trajectory. What is the launch angle? I am given no numerical values, but from my understanding gravity is a constant 9.8, and at the maximum height velocity should be equal to 0. 2.the equation...

Homework Statement In microgravity astronaut training and equipment testing, NASA flies an aircraft along a parabolic flight path. The aircraft climbs from 24,000 ft to 31,000 ft, where it enters a parabolic path with a velocity of 143 m/s nose high at 45.0° and exits with velocity 143 m/s at...

Homework Statement 1.[/B] two balls are thrown vertically from two points on a building. at the bottom of the building ball 1 is thrown and from the roof ball 2 is thrown. ball one reaches its maximum height after three seconds and ball two after one second. after two seconds the balls cross...

A ball is shot from the ground into the air. At a height of 9.1 m, its velocity vector (in unit vector notation) is (7.6i - 4.9j) m/s; that is, vx = 7.6 m/s and vy = -4.9 m/s. What was the maximum height of of the ball above the ground? I swear to god i have been working on this for 2 hours...

Homework Statement A ball was thrown from a cliff, it reached to the ground after 2.5 seconds. a) Find the height of the cliff. b) Find the horizontal distance the ball reached. Homework Equations Δy = 2⋅g⋅t^2 Vfy = g⋅t √(Vfy)^2+(Vfx)^2 Δx= Vx⋅t The Attempt at a Solution I've found Δy=30.6m...

Homework Statement What is the minimum initial velocity that has to be given to a stone in order to throw it across a sloped roof? The roof has width b, its two edges have heights a and c. Homework EquationsThe Attempt at a Solution i decided to start simpler so so i first looked at if was...

Homework Statement A projectile is launched: Horizontally, with an average displacement of 49 cm Vertically, with an average displacement of 28 cm At a 23 degree angle, with average displacement of 126 cm Homework Equations The Attempt at a Solution I am sad to say I don't know how to do it...

Homework Statement (For this problem ignore the height of the firefighter) A firefighter, a distance (d) from a building, shoots a stream of water at an initial angle, above the horizontal, at initial speed (Vo). At what height (h) does the water strike the building? No values were given to...

I am trying to solve for Vy with given Vx. I know how to do this for the BLUE trajectory line, but I do not know how to solve this if there is an obstruction in the way (like the gray wall). My givens are: X1 X2 Y1 Y2 Vx Gravity Do I need to solve for the blue trajectory then adjust that for...

Homework Statement A partice is projected at an angle 60 degrees with the speed 10 m/s. Then latus rectum is ? g= 10 m /s^2 Homework Equations i calculated the maximum height.Now what?? The Attempt at a Solution h= u u sin theta sin theta/2g

Homework Statement The maximum range of a bullet fired from a toy pistol mounted on a car at rest is R0=40m . What will be the acute angle of inclination of the pistol for maximum range when the car is moving in the direction of firing with uniform v=velocity 20m/s, on a horizontal surface ...

Hello ladies and gentlemen I am working on a Unity 3d game project and I am in need of some physics guidance. You probably know Unity3d has a built in physics engine, and if you don't you do now. :) I am determined to figure this out more or less on my own but I need some assistance with the...

I'm writing a novel and wanted to research a possible weapon I came up with to make sure the physics are at least possible. However, I could not find anything on vacuum-based projectiles other than ping-pong balls, while this is interesting, but it doesn't answer my question on what would happen...

Homework Statement I'm having trouble with part A of this question 1. A ball is fired out at an angle of 30° from the platform of height h = 0.5 m as shown in Figure 1. It is subjected to the gravitational force only thus follows a projectile motion. It falls onto the ground after 0.6...

Homework Statement A student can throw a football a max range of 60 meters. How far could he throw it if the Earth's gravity were reducted to 1/6 of its normal value , similar to the moon's gravity? Homework Equations v = .5at^2 The Attempt at a Solution I feel like i did this wrong but x =...