Object moving through space due to the exertion of a force.
0
votes
1answer
26 views
Projectile motion formulas
Assuming:
The equations for the vertical and horizontal components of my initial velocity. Are:
$v_{x,i} = v_i \cos\theta$ and $v_{y,i} = v_i \sin\theta$
And the displacement components are ...
0
votes
0answers
23 views
Required angle, projectile motion [on hold]
I have a target x meters away from my, lets say mortar crew. My mortar shells fire at some constant constant initial velocity Vi.. Is there a formula that will give me the angle required to hit a ...
-2
votes
3answers
56 views
launch angle with only intial velocity and time [on hold]
I'm at a loss here. I have a problem where I'm given the initial velocity and the time at which a projectile reaches its maximum height. I'm told to calculate the launch angle. I can of course assume ...
-1
votes
0answers
57 views
Projectile Motion involving trig identites [closed]
(HELP! I have no clue where to even begin with this!)
Many modern 3D video games must be designed such that objects move in ways as close as possible to reality. This is often called “game physics”, ...
0
votes
1answer
117 views
Projectile motion, what is the relation between initial angle and speed at a given distance [on hold]
I am trying to understand the relation between the initial angle of a projectile and its initial speed, given that the distance this projectile will travel is fixed and at the same height as the ...
5
votes
4answers
237 views
How much does the Earth's rotation affect a golf ball?
When launching rockets into space, they start straight but begin to lean, I assume due to the Earth's rotation.
For something on a much smaller scale, such as a golf tee, is there a measurable ...
0
votes
0answers
36 views
How to find the angle of elevation and launch speed? [closed]
A particle is projected from a point on level ground with a speed of $u$ meters per second and an angle of elevation $\theta$. The maximum height reached by the particle is $42$ meters above the ...
-10
votes
1answer
60 views
Is this a standard projectile motion equation? [closed]
Is Initial Velocity = Time * Acceleration a standard projectiole motion equation?
0
votes
1answer
62 views
Does the time to reach the highest point $P$ equal the time to reach the ground from $P$ in a trajectory, taking drag into account?
Assume a very simplified model without Corolis effect, the falloff of the local gravitational field and the like. My answer is no. It is sufficient to look at the vertical velocity of the projectile, ...
1
vote
1answer
62 views
Projectile motion of a charged particle in a homogeneous electric field
I'm reading an article about projectile motion, but I'm having some trouble with how the author found the equations of motion when a homogeneous electric field is considered.
To allow an immediate ...
0
votes
1answer
61 views
3D billiard with no gravity nor air drag
If I have a projectile shot in a vacuum-box that has no gravity or wind resistance inside it (lets say the box is 1000 units tall and 1000 units wide), with the only rule being that the projectile ...
0
votes
1answer
68 views
Projectile maximum height [closed]
How can I determine the needed initial velocity to make a 2d wind resistance free projectile (in computer simulation) reach maximum height at a certain x distance away, with launch position and target ...
0
votes
0answers
83 views
Is it possible to solve a 2D relative motion question using components of relative velocity?
This is a question based on concepts of two dimensional motion . Here's how the question is:
A plank A is floating in air, gravity has no effect on it (See its coordinates in the figure attached). ...
6
votes
7answers
244 views
What happens when the spacecraft velocity equals the velocity at it's exhaust?
So there I was resting me eyes thinking about rocket drives, and what-not. The thought struck me that, perhaps, even before Mr. Einstein interferes with the increasing velocity of the spacecraft Mr. ...
1
vote
2answers
145 views
Projectile Motion Question involving a ball and a ramp inclined at an angle
The question is to finde the initial horizontal velocity of the ball at end of the ramp, where it is released.
I know how to do this using gravitational potential energy and kinetic energy ...
0
votes
2answers
94 views
Finding the drag force (Air resistance force) for accelerated ball?
As you know if I want to find the force for an accelerated object I will use the law $F_o=ma$ so I can get the affecting force of it.
But there is another force affecting against the object. It's the ...
2
votes
2answers
103 views
Does gravity slow down a horizontally thrown baseball?
I have a simple question: Does gravity slow down a horizontally thrown baseball?
Assuming when a baseball is thrown it has a vertical velocity as well, does it slow does the ball?
Any help is much ...
1
vote
1answer
67 views
1D Motion under Gravity
I have attempted this question in so many different ways but I am getting nowhere. Could someone point me in the correct direction so I can work it out myself?
Here is the question:
An object $K$ ...
0
votes
1answer
122 views
A bumpy ride on a bike?
While riding a bike at a higher velocity, I go over the speed breakers (Hump)
I get jumped over the bike for a certain height. How do I calculate this height of jump with respect to the seat of the ...
1
vote
1answer
54 views
Calculating Mass for a Reduced Trajectory while Keeping Projectile Force Constant
Apologies if this is not a research-specific question, but applied mechanics.
A firefighter has to pass a test in which he is to throw a medicine ball a certain distance. The ball is thrown at a 45 ...
6
votes
3answers
284 views
Intuitive meaning of factor 2 in formula of vertical throw max height $h=v^2/2g$
This is a question about a simple thing. The simplified expression for maximum height in vertical throw is $h=\frac{v^2}{2g}$ , could anyone explain intuitively (analogies are welcome) why there is a ...
-4
votes
1answer
36 views
From the top of a 400 m high rock by the sea, a ball is shot out in the horizontal direction. The ball speed is 100 m / s [closed]
From the top of a $400 m$ high rock by the sea, a ball is shot out in the horizontal direction. The ball speed is $100 m / s.$
a) After how much time the ball hits the water?
b) At what rate does ...
-1
votes
1answer
159 views
Newtons Cannon ball problem [closed]
Let's I have a Newton's Cannon ball of 15 kg and want to fire so it will round the earth and back to me.
My query is which law can evaluate the speed that cannon ball will revolve round the sun ...
0
votes
1answer
95 views
Bouncing ball simulation computer science
In my Computer science class I was given a problem where I have to simulate a bouncing ball using "real physics". I have been trying to find a equation that will simulate the height of the bounce ...
2
votes
2answers
113 views
How to calculate air resistance of penny dropped from Empire State Building?
If a penny is dropped from the Empire State Building, then its speed, without taking air resistance into consideration, is
$\sqrt{\left(32\frac{\textrm{ft}}{\textrm{s}^2}\right)(1454\textrm{ ...
5
votes
1answer
380 views
In tennis, why does topspin serve bounce higher than flat serve?
When receiving servers (while playing tennis), I've noticed that the tennis ball seems to bounce up higher on me when the server uses a topspin serve than when the server hits a flat serve. Why is ...
1
vote
0answers
88 views
Why is the angle of impact complementary to the angle of launch in the simple equations for the range of a projectile?
I'm using the standard equation for the range of a projectile:
\begin{align}
d &= \frac{v\ \text{cos}\theta}{g} \left( v\ \text{sin}\theta + \sqrt{v^2\ \text{sin}^2\theta + 2gy_0}\right)
...
1
vote
2answers
164 views
How can I solve for time without knowing the vertical velocity?
A guy posted this problem on a forum:
There is a bird sitting on a pole of height h. you throw a rock at it and the moment the rock leaves your hand the bird starts flying horizontally away from ...
0
votes
1answer
107 views
Reachable area of cannonball given fixed initial speed [closed]
The trajectory of a cannonball fired from the origin with initial speed $v_0$ at an angle $\theta$ is given by
$$y = x\tan\theta - \frac{g}{2v_0^2 \cos^2\theta}x^2.$$
For fixed $v_0$, at what angle ...
1
vote
1answer
304 views
Projectile along incline [closed]
A particle is projected with velocity $u$ from the bottom of an inclined plane whose inclination with the horizontal is $\beta$. If afterwards the projectile strikes the inclined plane perpendicular ...
0
votes
2answers
108 views
How to calculate time for ball to reach plane while considering mass, gravity and wind resistance?
The scenario that I'm having is such that a ball of radius $15mm$ is thrown from a location point $\vec{p}=(2, 5, 2)$ in a direction of $\vec{d}=(3, 0, 4)$. The initial velocity is $30m/s$. There were ...
0
votes
0answers
80 views
Trajectory the body thrown at angle to the horizon
I need to simulate some body, thrown at some angle to the horizon and at some azimuth.
What would be $x(t)$, $y(t)$ and $z(t)$ involving $g(h)$, air resistance (with $\rho(h)$), Coriolis effect and ...
2
votes
2answers
135 views
Parabolic motion (experiment)
We performed a laboratory, performing six releases of a sphere with angles $15^\circ,30^\circ,45^\circ,60^\circ,75^\circ,40^\circ$ a parabolic movement, took five distances for each angle, the initial ...
0
votes
2answers
302 views
Given Angle, Initial Velocity, and Acceleration due to Gravity, plot parabolic trajectory for every “x”?
Given any Angle -> 0-90
Given any Initial Velocity -> 1-100
Given Acceleration due to Gravity -> 9.8
Plot every x,y coordinate (the parabolic trajectory) with cartesian coordinates and screen pixels ...
8
votes
4answers
901 views
What causes a soccer ball to follow a curved path?
Soccer players kick the ball in a linear kick, though you find it to turn sideways, not even in one direction. Just mid air it changes that curve's direction. Any physical explanation?
Maybe this ...
0
votes
3answers
242 views
Solve for Initial Velocity of a projectile given Angle, Gravity, and Initial and Final positions?
I've found equations http://www.physicsclassroom.com/Class/1DKin/U1L6a.cfm for solving everything (and rearranged to solve everything) to do with projectile motion EXCEPT this, even though it should ...
1
vote
3answers
188 views
Projectiles and escape velocity
Q: The escape velocity for a body projected vertically upwards from the surface of earth is 11 km/s. If the body is projected at an angle of $45^\circ$ with vertical, the escape velocity will be?
...
0
votes
1answer
61 views
Projectile's angle in midflight
For a missile travelling from (0,0) at angle $\theta$ (to the horizontal) and initial velocity $u$, the y (vertical) position at time t is given by
$s_{y} = u\sin (\theta) t - 0.5gt^{2}$
and the x ...
1
vote
0answers
157 views
What is the initial velocity of a projectile so that it passes through a target point in its trajectory? [closed]
Let's say I have a projectile being thrown by a player in my 2-D game. I want to work backwards and find the initial velocity to apply to the projectile such that it passes through a target point in ...
1
vote
0answers
102 views
Getting pairs of angle and velocity for a projectile to a given destination
I'm trying to calculate the initial velocity $v_0$ and angle $\theta$ for a given destination $(x, y)$ with a launch height of $y_0$. Obviously there will be a set of pairs of velocity and angle that ...
1
vote
5answers
549 views
How to get the angle needed for a projectile to pass through a given point for trajectory plotting
I am trying to find the angle needed for a projectile to pass-through a given point.
Here is what I do know:
Starting Point $(x_0,y_0)$
Velocity
Pass-through point $(x_1, y_1)$
I also need to ...
1
vote
0answers
119 views
I need help with the following Physics' questions [closed]
I need to know which formulas and the step-by-step answers for the following physics questions:
1. You throw a ball upward with an initial speed of 7.0 m/s, and it returns to your hand o.92 ...
1
vote
0answers
62 views
A 0.1kg ball of dough is thrown up with a velocity of 15m/s. What is the momentum halfway up? [closed]
I know that $p=mv$ and (0.1kg)(15m/s)=1.5 kg m/s and the momentum at the vertex is 0, but what is the momentum halfway up?
1
vote
0answers
55 views
How to calculate the correct coordinates from a distorted video of a projectile?
I am working on a high school project that is related to projectile motion. I am exploring how exactly the position of the center of mass affects the trajectory of a long but thin, javelin-like ...
1
vote
3answers
252 views
Projectile motion, canon vs cliff
A cannon is placed at the bottom of a cliff 85 m high. If the cannon is fired straight upward, the cannonball just the reaches the top of the cliff.
a) Calculate the initial speed of the cannonball.
...
0
votes
1answer
86 views
Is it necessary to know initial y velocity to solve this projectile motion problem?
A marble is launched horizontally off a 93.0-cm high table causing the marble to land on the floor 1.85 m from the base of the table.
a.) How long was the ball in the air?
b.) With what ...
1
vote
1answer
174 views
Projectile motion problem with upward acceleration and horizontal velocity [closed]
An electron in a cathode-ray tube is traveling horizontally at 2.10×10^9 cm/s when deflection plates give it an upward acceleration of 5.30×10^17 cm/s^2 .
B.) What is its vertical displacement during ...
2
votes
3answers
207 views
In projectile motion, what does it mean for the motion along the $x$ and $y$ axis to be independent?
In projectile motion, what does it mean for the motion along the $x$ and $y$ axis to be independent?
This question is referring to the concept of projectile motions.
1
vote
1answer
288 views
Monkey and tree - projectile motion
The famous scenario: A hunter is trying to shoot a Monkey hanging from a tree. However, this question doesn't mention the monkey jumping down from the tree or trying to escape. (The hunter uses a ...
0
votes
1answer
363 views
How do I find the magnitude and angle of the velocity?
I'm confused about the following problem.
A ball is shot from the ground into the air. At a height of $9.1\text{ m}$, its velocity is $v = (7.6\hat{\imath}+ 6.1\hat{\jmath})\text{m/s}$, with ...
