Projectile Definition and 1000 Threads

Hello, I am a first year science teacher doing my best with teaching physics for the first time (my degree is chemistry but I am in a very small school). I am teaching projectile motion. I was creating a worksheet and trying to solve a problem I made up when I realized something wasn't working...

Homework Statement A bridge rises 321 m above the water. Supposed Jack kicks the rock horizontally off the bridge. The magnitude of the rock's horizontal displacement is 45.0 m. Find the speed at which the rock was kicked. Homework Equations Kinematics I think? v = vo + at Δx = vot + 0.5at2 v2...

Homework Statement A backpacker throws a rock horizontally off of a cliff with an initial velocity of 11.7 m/s, and the rock lands 17.3 m away from the base of the cliff. What is the final vertical velocity of the rock? Round your answer to 2 decimal places. Homework Equations Δd = vot +...

Homework Statement A cannonball is fired out of a cannon at 45 m/s at an angle theta in the positive x direction 500 meters away from a car moving in the positive x at a constant 20 m/s. At what distance does the cannonball hit the car? Homework Equations I am unsure of how I would solve...

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Homework Statement Question says there is a car moving at 2 m/s and a projectile is launched from top of the car at a speed of 7 m/s relative to the car. They give the angle as 25 degrees above the horizontal but then ask what is the angle that it makes with ground when it finally lands? My...

Homework Statement There was a plane with the height of 1 km above the ground. The plane is moving horizontally 200 m/s and can fire a bullet with the velocity of 400 m/s. At one time, the the gun form an angle of 37(degree) and fired the bullet. I was confused with the horizontal (x-axis)...

Homework Statement I am trying to find the force needed from a spring to launch a mass of 800g to a length of 0.875m. This launch would be at the optimum angle of 45º. I am aware of all projectile motion equations but am having difficulty linking them to force and thus solving the problem...

A ball is thrown horizontally from a height of 20m and hits the ground with a speed that is three times its initial speed. What is the initial speed?d=vit+1/2at^2I found the time of flight vertically first, which is 2.02 sec. And then I am trying to find the initial speed. Even if it is thrown...

Homework Statement Homework Equations kinematics. a=F/m The Attempt at a Solution 100cos(70)=342 100sin(70)=393.7 X=1/2(-9.8)t^2+100t; t=0. t=20.4

My professor did this question in class and I am a little confused. I wrote it down in my notes but I kind of don't understand it. The question is: Find theta 1/4 of the way through the flight of a projectile in time He does not give us numbers. Everything has to be solved algebraically. My...

Homework Statement Two cannons(A at inital height h; B at initial heigt h/2) fire(horizontally), B firing with higher velocity than A. Homework Equations 1) If they fire at the same time, is it possible that the projectiles collide? 2) Is it possible for B to delay his shot so that his...

Homework Statement A test rocket is fired from rest at point (A) along (b) a 200m incline, accelerating 1.25 m/s2 Given: b = 200 m, the angle at point A is 35°, a = 1.25 m/s2 a) Find the maximum height above the ground. b) Find the greatest range. Homework Equations If it was a constant...

Homework Statement A canon is burried on a hillside, so the barrel is exactly at the height of the surface. The hillside creates angle theta with vertical, where 0 degrees < theta < 90 degrees. A canonball is fired with speed v_0 perpendicular on the hillside. The angle between velocity_0 and...

Heres the Problem... A 2.0 kg object is launched from a 100 m tall cliff with an initial velocity of Vo=40m/s @ 30 degrees. There is a 40 m tall obstacle 200m from the base of the cliff. a)write initial velocity in "i,j" notation -I found this to be 34.64m/s i + 20m/s j = Vo b) how far above...

Homework Statement At 0.5 of its maximum height, the speed of a projectile is 0.75 of its initial speed. What was its launch angle? Homework Equations Not sure here, but: v^2 - vo^2 = 2as [maximum height] Ay = Asin(theta) [y-component] The Attempt at a Solution I didn't get very far...

Homework Statement The question states : Romeo tosses a pebble at Juliet's window to wake her. Unfortunately, he throws too large a pebble too fast. Just before crashing through the glass, the pebble is moving horizontally, having traveled a horizontal distance x and a vertical distance y as a...

Homework Statement A water hose is used to fill a large cylindrical storage tank of diameter D and height 2D . The hose shoots the water at 45 ∘ above the horizontal from the same level as the base of the tank and is a distance 6D awayHomework Equations Vx=Vt D=vit+1/2at^2 The Attempt at...

Homework Statement Check for first upload Homework Equations I wrote them down in my attempt at a solution The Attempt at a Solution Second upload, 81.48 meters high seems really wrong to me...

I ran a simulation on WinPlot (see attached video) on my computer and was a bit surprised to see that the optimal launch angle of a projectile (with NO air drag) leaving uniform circular motion is dependent on the initial tangential velocity (or at least Winplot thinks it does). Can someone...

Homework Statement An Arrow is shot from an initial velocity of 45 m/s 52 degrees above the horizontal. It lands on a 5 m high roof of a house. The arrow is shot from a height of 1.5 m. (v) Would it be able to pass over a 50 m high tree located 75 m away? (vi) What is its' total time of...

We are building an air cannon that shoots a wad of paper. I know the volume of the tank, the pressure of the tank, the size of the barrel, and the weight of the object. I need to know how to solve for initial velocity given this information. I will use the Vi to find the estimated distance...

Homework Statement Uploaded Homework Equations x(t)=xo+v0xT+1/2axt^2 The Attempt at a Solution (2Vo)costheta(t)=R, How would I get rid of T?

Q) two identical smooth balls are projected from points O and A on the horizontal ground with the same speed of projection the angle of projection in each case is 30 The distance between O and A is 100m . The balls collide in mid air And return to their respective points of projection if...

Homework Statement A golfer hits a shot to a green that is elevated 3.0 m above the point where the ball is struck. The ball leaves the club at a speed of 14.0 m/s at an angle of 40.0° above the horizontal . It rises to its maximum height and then falls down to the green. Ignoring air...

Homework Statement The diagram shows the impact of 20 projectiles launched at the same speed and angle. What is the uncertainty in the impact position? (see attached file for picture of diagram) Homework Equations No equations, my lab instructor said through an email that I can get it "just by...

I've been trying to come up with the answer but it hasn't gotten me anywhere. I know that I need to find the angle to get the velocity. Q: A rock is projected from the edge of a 30.48 m tall building at some unknown angle above the horizontal. 5 seconds after, the rock strikes the ground at a...

Homework Statement You are the chief of the Angry Birds (Google it, if you don’t know the reference...it’s not important). You can shoot red birds from a catapult, and they will fly as projectiles under the effect of gravity. Gravity points downwards and has magnitude g = 9.80 m/s2 . Your goal...

One bullet was fired from Gun A and Gun B each at varying time interval. Both the guns are 10 meters above the ground. Calculate: a) Which gun was fired first. b) Displacement and time at which the two bullets will collide.

In class our teacher shows a problem where he finds out the torque acting on a projectile at the highest point of its trajectory. He calculates the horizontal displacement from the vertical axis to the highest point as "r "and multiplies with "mg" as "F". Here I am a little confused. Isn't...

Homework Statement Upon spotting an insect on a twig overhanging water, an archer fish squirts water drops at the insect to knock it into the water (Fig. 4 -38). Although the fish sees the insect along a straight-line path at angle f and distance d, a drop must be launched at a different angle...

Homework Statement A rolling projectile launcher is initially at rest. Then internal compressed air accelerates the projectile through a distance L in a pipe (see diagram). The acceleration of the projectile with respect to the pipe is ap. During the launch the launcher has a recoil...

Consider the following diagram of a projectile motion (##\hat{\bf i}## and ##\hat{\bf j}## are the unit vectors of the ##x## and ##y##-axis respectively) We know that $$F=ma.\tag1$$ This can be rearranged to $$a=\frac Fm.\tag2$$ So there are actually two accelerations, one with magnitude...

1. Homework Statement The problem and all known information is attached. Homework Equations The kinematic equations are attached. The Attempt at a Solution My attempt is attached. I did part (a), (b), and (c), right. How do I do part (d)? I tried distance/ time .

Homework Statement You kick a ball with a speed of 2 m/s, at a 45 degree inclination to the horizontal. You measure h to be 4⁄15 m. What planet are you on? Homework EquationsThe Attempt at a Solution Upon first glance, I thought that this problem did not provide enough information...

Homework Statement The problem (5.9) and given data is attached. Homework Equations All relevant equations are given (5.9). On (5.9) What does the s subscript y represent? And why does gravity equal -32? The Attempt at a Solution The solution is given. This is a scan problem.

1. Homework Statement A jumper runs horizontally off a 910 meter mountain with speed 4.0 m/s and enjoys a free fall until she is 150 meters above the valley floor, at which time she opens her parachute. Ignore air resistance Homework Equations A) how long is the jumper in free fall. B) how...

Homework Statement A particle travels between two parallel ver- tical walls separated by 25 m. It moves to- ward the opposing wall at a constant rate of 9.2 m/s. It hits the opposite wall at the same height. The acceleration of gravity is 9.8 m/s2 . (IMAGE FOR CLARIFICATION ATTACHED) a)...

<< Thread moved to the HH forums from the technical physics forums, so no HH Templatge is shown >> So I have this question that says, "Someone at a third floor window (12 m above ground) hurls a ball downward at 45 degrees at a speed of 25.0 m/s. How fast will it be traveling when it strikes...

Homework Statement An artillery shell is fired at an angle of 23.9◦ above the horizontal ground with an initial speed of 1530 m/s. The acceleration of gravity is 9.8 m/s2 . Find the total time of flight of the shell, neglecting air resistance. Answer in units of min. Homework Equations...

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 The resistance to motion of a projectile, of mass m, is proportional to its speed. When falling vertically its terminal velocity is 19.6 m/s. The projectile is thrown vertically upwards with gravity acting downwards. (a) Assume that the resistance to motion can be expressed...

Homework Statement Planning a new stunt where he will be shout out of a cannon into the back of a speeding utility vehicle the sit slopes downhill at 10 degrees and the cannon will launch him at 35Km/Hr at and angle of 30 degrees as shown in the attached picture Homework Equations I cannot...

Homework Statement Water is sprayed at an angle of 90° from the slope at 20m/s. Determine the range R. PLEASE SEE ATTACHMENTHomework Equations [/B] Kinematic Equations: acceleration: A = 0i +g(-j) + 0k; velocity: dV/dt = A; position: dR/dt = V; Origin set at the point spout...

Is it possible to get the projection of an object with the help of accelerometer,gyro-meter and magnetometer data?

Homework Statement for a projectile show that d^2 (v^2) / dt^2 = 2g^2 2. The attempt at a solution =d/dt (d(v^2)/dt) =d/dt (2v)

1. The shape of the ping pong launcher I think is 'catapult' but I don't know the suitable size and the materials need to use. The ping pong ball need to be launch to a distance of 4m and 10m respectively. What are the size and materials used is most suitable to launch the ping pong ball this far ?

Idk if anyone has figured this out, but I believe I've found a new equation for the length of an arc traveled by, say, a football. I uploaded a picture of it. I don't have any experimental proof for it, but I used tricky mathematical manipulations with standard projectile equations, the...

Homework Statement a ball rolls off an incline on top of a 9.0m building at a velocity of 22m/s 32° below the horizontal how far from the base of the building will the ball hit the ground? [ANS = 11m) Homework Equations vf^2 = vi^2 + 2ad d = ((vf+vi)/2)t d = vt The Attempt at a Solution x...

The following graph (ATTACHED) represents the horizontal velocity component (Vx) verses time for a projectile thrown horizontally off a cliff. (Ignored Air resistance) . But I thought that graph will be a 45 degree slope straight line , because Horizontal component of velocity of projectile...