Questions tagged [projectile]

Object moving through space due to the exertion of a force.

Filter by
Sorted by
Tagged with
1
vote
1answer
26 views

Finding the angle required to hit a stationary target

Ignoring air resistace, I have that the height of our canon is $8.2$m and the height of the target is $6.34$m. And that our initial veocity $v_0=18$m/s. I have to determine a way to find the angle ...
0
votes
1answer
44 views

What equation should I use if I am estimating the distance of a rocket's landing point to the point it was launched from?

I am trying to figure out how to estimate how far (in meters) that a solid fuel model rocket will land from its launching point. To do this, I have figured out I will need to estimate the maximum ...
0
votes
0answers
23 views

Doubt in resolved vectors in SUVAT equations

In the (ii) part of this question, I have used s = ut + 1/2 at^2 and also tried v = u + at In the answer, the velocity is taken as the vertical component of the velocity. Why is this? Why can't we ...
0
votes
0answers
32 views

How to estimate time to fall with air drag and variable density?

I would like to estimate the time that it takes for an object to fall if it is there a quadratic drag force and a variable density. In a vacuum, the falling time $t_\mathrm{vacuum}$ has a simple ...
0
votes
1answer
86 views

How do I calculate where a solid fuel rocket will land if the rocket is launched at a 45 degree angle?

Let's say I was launching a model rocket at a 45 degree angle to find the distance between the rocket's landing site and the rocket's launching site, but before launch I wanted to try and calculate ...
0
votes
1answer
33 views

Minimum velocity required to reach the top of the rollercoaster using conservation of energy [closed]

A rollercoaster (assuming to be a point particle) is encountering a circular track of radius R. What is the minimum speed required for the rollercoaster to reach the top of the obstacle? Assume the ...
0
votes
1answer
22 views

How does changing track diameter change ball velocity [closed]

For an experiment; A ball is rolled down a ramp and drops off a table The theoretical and practical horizontal distance of the ball is compared. Adjustments are made to reach the initial distance I ...
3
votes
3answers
2k views

What does “Just before” and “Just after” really mean in physics problems?

So I'm stuck in a dynamics problem that asks what is the acceleration of a body just after A, where A is the point that separates the motion of the body from a curvilinear path to projectile motion. ...
-1
votes
2answers
75 views

What does $d$ stand for in this formula?

Context: I am building a tennis ball machine and am having trouble interpreting the following formula for the flight path of the ball. I know all of the other values in the formula but the source I am ...
0
votes
1answer
47 views

How much weight do I need to lose to grab the basketball rim?

I am 195 pounds, 71" tall, standing reach of 92”. Currently, I can jump to touch 115" in height (finger tips). I'd like to jump to 123" in. to grab the basketball rim. (Note: 10ft/120&...
0
votes
0answers
35 views

Using air resistance (drag) in Python calculation

I am simulating a free fall with a function that needs to calculate the time it takes for a particular object to reach the surface, I got this program working without accounting for air resistance.. ...
1
vote
2answers
67 views
+50

Angle of releasing a pendulum and the speed of the ball hit by it

I have conducted the experiment. My independent variable is the angle of releasing the pendulum and my dependent variable is the speed of the ball that is hit by it. I know the following quantities: ...
2
votes
4answers
65 views

Which cases $g$-force is negative $(g=-9.81m/s^2)$?

A stone was dropped into an empty well. It takes 10 sec to hit the ground. What was the velocity of the ball? So since I have to use the formula $v=gt$ I'm quite confused if g=$-9.81m/s^2$ or not? ...
1
vote
1answer
24 views

Solving for Initial Velocity [closed]

A ball is dropped from the building 150 m high at the same instant a second ball is thrown upward from the ground. If the two balls pass each other at a point 60 m above the ground, solve the initial ...
1
vote
0answers
47 views

Vertical+Horizontal Throw [closed]

From the top of a cliff, a stone is thrown vertically upwards with a speed of 21.8 m / s. From the same height, a second stone is dropped 3 s later. Both stones hit the ground simultaneously. Under ...
0
votes
1answer
22 views

Relationship between payload weight to the range of a ballistic missile

is it possible to talk about how much extra range a ballistic missile gets if its warhead were to shrink by say 10x?? that is without knowing other details about the missile. For example: Iran claims ...
0
votes
2answers
51 views

Forces on a spinning ball

The drag force opposes the direction of velocity, and the lift force is perpendicular to both the drag force and the rotation direction. So if a tennis ball is rotating clockwise and moving to the ...
1
vote
0answers
39 views

How is the energy dissipated by drag split between sound waves and turbulence?

Consider an object of radius $R$ traveling at a constant, slightly subsonic or supersonic speed through a homogeneous fluid, in conditions of very high Reynolds number. Because the object experiences ...
0
votes
1answer
42 views

Trouble with Equations for 2D projectile motion WITH air resistance? [closed]

My AP students are learning 2D kinematics, and it got me in the mood to play around with projectiles WITH air resistance, just for fun because we always neglect it, and so that I can maybe show them ...
1
vote
1answer
39 views

How Would Projectile Motion Be Described in Non-Euclidean Space?

If I and a friend found ourselves in a world described by spherical geometry (as simulated in this linked video https://youtu.be/yY9GAyJtuJ0 ) how would the kinematics equations need to be augmented ...
0
votes
1answer
33 views

Kinematics Physics Toy

A toy was rolled off the table at 10 m/s and landed 5 m from the table. The same car is rolled off the same table at 15 m/s. Would the time the car was in the air increase, decrease or stay the same?...
0
votes
1answer
50 views

Difference between horizontal and oblique projectile motion

I have been studying kinematics and I am stuck with understanding what is oblique projectile and what is horizontal projectile and what is the difference between them? Can someone please explain them ...
0
votes
3answers
56 views

How many forces are acting on a projectile when it is passing through the highest point in the trajectory if air resistance is ignored?

This is a projectile motion question and the question basically states that an object is launched at $45$ degrees with an initial velocity of $28m/s$ east. So, how many forces are acting on a ...
-2
votes
2answers
51 views

Laws of motion and Forces [closed]

Explain with the use of equations why a pistol fired from the clouds 10km away is capable of killing a person on the ground compared to when it is fired horizontally over same distance.
1
vote
1answer
35 views

Kinematics: rest and motion [closed]

A ball is dropped from a height of 19.6 m above the ground. It rebounds from the ground and raises itself up to the same height. Take the starting point is the origin and vertically downward as the ...
1
vote
2answers
94 views

Can we Predict the Trajectory of a hypersonic missile?

I read in a newspaper that we can't predict the trajectory of a hypersonic missile and this property makes the missile undetectable. But I couldn't understand why can't we predict it's trajectory? ...
0
votes
1answer
46 views

Angle for max range from general range equation

Problem: Show that if a projectile is shot from a height $h$ with speed $v_0$ the maximum range obtains for launch angle $\theta = \arctan(\frac{v_{0}} {\sqrt{2gh+v_{0}^{2}}})$. I'm able to derive ...
0
votes
1answer
43 views

(BASIC) How do I solve this free falling question?

If someone could just show me how to solve part A, I think I can try the rest on my own. Here is the question: A model rocket is launched straight upward with an initial speed of 47.0 m/s. It ...
2
votes
2answers
67 views

What is the angle to launch projectile in 2D, given destination displacement and initial velocity? [closed]

Description of the problem I want a projectile launched at speed $v_0$ at angle $\theta$ above the horizontal to just make it to the top of a building of height $h$ and a distance $d$ away. What $\...
4
votes
2answers
64 views

Weird projectile motion question

The question is as follows: A ball is thrown from a point $O$ towards a vertical wall in such a way that, after rebounding from the wall, it returns to $O$ without striking the ground. The ball’s ...
1
vote
1answer
30 views

Determine the velocity by a projectile motion [closed]

A snowball rolls from the roof of a large barn that has a downward slope of 20 °. The roof end is 15.0 m above the ground and the snowball has a speed of 6.00 m / s when abandoned from the roof. At ...
1
vote
2answers
103 views

Projectile motion on incline with time-limited, constant acceleration

I have a projectile in 2D space $r=(x, y)$ at time $t_0=0$, which has an initial velocity $v_0$, a launch angle $\theta$ from $(1, 0)$ and which accelerates with a constant $a_0$ until time $t_1$ in ...
-6
votes
3answers
73 views

Motion in a straight line

Velocity and acceleration are directly proportional to each other but in the case of throwing a ball up , at the top velocity is zero but acceleration is there. why?
1
vote
3answers
41 views

How long will it take for a projectile to be knocked off a wall? (See details)

I am trying to calculate the impulse of an object that is thrown against a wall. Problem is, to calculate the impulse one needs to know not just the force, but also the time it takes for the momentum ...
1
vote
1answer
68 views

Maximum distance traversed in an ideal projectile motion

In a projectile motion, consider the projectile to be launched from $(0,0)$ as traced to be on cartesian axes. Then the trajectory is given by $$y=x \tan \theta \big(1-x/R)$$ where $\theta$ is ...
0
votes
5answers
73 views

Football Dynamics

Suppose a football is racing towards you at some speed $v$. What you are gonna do is try to stop it. There are two scenarios: 1.Suppose you hit it with your closed fist in the direction opposite to ...
1
vote
2answers
44 views

Launch angle affecting the splash height of a ball

I need to do an experiment about the launch angle of a ball affecting its splash height. I have no idea if it's feasible or not, and I can't find anything similar online. Can anyone help? My set up is ...
0
votes
4answers
50 views

Why is the maximum horizontal range in a projectile motion given by shooting with an angle of $\pi/4$ inclination about the horizontal direction? [closed]

I've heard sometimes that in projectile motion you need to shoot things with a $\pi/4$ angle in order to get the maximum range, but why does that happen? In this case I know that $$x(t) = x_0+v_{0x}t$$...
0
votes
3answers
87 views

Is it true that maximum height attained by a body projected vertically upward is irrespective of mass?

For example, if I threw a 1 kg stone and a 100 kg stone vertically upward with the same velocity will they reach the same height, if yes then how?
0
votes
7answers
130 views

Vertical motion of an object

We define acceleration as $-9.8\frac{m}{s^2}$ for an object that is thrown upwards due to gravity. My question is when the object reaches maximum height at the point where it is about to turn around ...
1
vote
1answer
91 views

Motion of a projectile

We all are aware how we can use the forces and vectors to describe a classical projectile motion (No drag forces). Major things we already know include: Position-time dependence of projectiles Range ...
1
vote
3answers
319 views

What does negative time mean or what does it show? [duplicate]

In this question when I solve for time I get $t=-1$ & $t=5$. What does it actually mean at $t=-1$?
0
votes
4answers
81 views

Why can a batter hit a pitched ball farther than one thrown by himself? [closed]

The main problem I am having is what Actually remains constant in the two cases. Is it the average force, or the time period for which the force is exerted? any helpful hints would be appreciated. ...
0
votes
1answer
40 views

How does a bullet achieve its stability when fired?

As far as I know, darts, arrows, and airplanes have the center of gravity(CG) ahead of their center of pressure(CP) and often have fins at the rear to achieve stability. Contrary to these, bullets ...
0
votes
1answer
45 views

Finding the radius of curvature of the trajectory of a projectile [closed]

The parabolic trajectory of a projectile has different radius of curvature at different points of time. Is there a way to find R of C for a simple projectile, thrown at an angle θ and initial ...
0
votes
3answers
71 views

Rapid-fire projectile motion such that all particles land at the same time

A short-barrelled machine gun stands on horizontal ground. The gun fires bullets, from ground level, at speed $ u $ continuously for a period of one second, but does not fire outside of this interval. ...
-1
votes
2answers
50 views

Trajectory of hitting stump by swinging the ball

If we want to hit a target by a stone or missile we have to consider and calculate the interaction of the surroundings with the thrown object precisely. Can you show a mathematical model or trajectory ...
0
votes
2answers
62 views

Theoretical question about velocity and acceleration

Imagine you have a ventilator that is spinning madly an creating strong air up force upwards. Then you put in the middle with a holder a paper ball. Then some-have detach the paper from holder. Sure ...
1
vote
1answer
43 views

How to calculate the precise displacement of an object in projectile motion?

I am curious about how to calculate the precise location of a projectile. Assuming that acceleration due to gravity is $-9.81 \text{ms}^{-2}$, how would you calculate the displacement of a tennis ball ...
1
vote
2answers
98 views

Projectile motion of a basketball shot

I'm working on a project which calculates the some statics of a basketball shot. I haven't done physics since high school so I wanted to see if I was on the right track or if I'm completely wrong. ...

1
2 3 4 5
20