Questions tagged [projectile]
This tag is for questions relating to projectile, object moving through space due to the exertion of a force. The path of a projectile is called its trajectory.
1,361
questions
-3
votes
1
answer
27
views
Oblique Projectile Motion [closed]
It is a multi-correct question.
We have a body projected from the top of a tower with specific initial conditions.
$V initial = 9.8 m/s$
$Height = 19.6m$
1
vote
0
answers
42
views
Draw the angle graphically [closed]
Hi everyone (sorry for the "unclear" title), I'm having trouble graphically representing the point of this:
A stone is thrown from the top of a tower with $h = 50\text{m}$ and with a ...
- 11
-2
votes
5
answers
105
views
When an object is thrown towards the sky it starts to gain potential energy, why?
I didn't think so because when an object is thrown towards the sky it already has kinetic energy and it looses it's energy due to the gravitational force of the earth.
When the object looses all of it'...
0
votes
1
answer
48
views
Issue with simplifying the equation related to non-uniform acceleration
I am exploring how the cross sectional area of a drogue chute affects its velocity after travelling a set distance.
I got this equation:
$$m_1 a = m_2 g - \frac12 c_d \rho A v^2,$$
This covers the ...
- 1
30
votes
2
answers
3k
views
Error concerning projectile motion in respected textbook?
In the textbook Fundamentals of Physics by R. Shankar of Yale Open Courses, appears the following assertion pertaining to a car driving off a cliff, which seems correct:
This is exactly how long it ...
- 473
-1
votes
2
answers
51
views
For an objective falling, reaching terminal velocity and then hitting the ground, how can I find the force it exerts on the ground? [closed]
For example object with v=tanh(0.1213)t/0.01236. m=69kg.
I thought I had to use F=mv/t but that just gives the net force of the object while falling.
I don't know how to find the force impacting on ...
- 91
-1
votes
3
answers
57
views
Different results of Range of a projectile [closed]
My question is from the Range of a projectile. Range is displacement of the projectile through X-axis. We all know the formula for the range $R$ of the projectile is $$R=\frac{v_0^2\sin(2\theta)}{g}$$ ...
0
votes
2
answers
42
views
How to find the resultant speed component, and finding the angle in which the trajectory had hit the ground?
When having a trajectory traveling over a projectile, both the vertical and horizontal velocity components must be obtained in order to calculate the resultant velocity.
The question is: Why the ...
0
votes
0
answers
51
views
Rocket equation non-constant gravity
I am currently trying to teach myself differential equations and wondered about the following problem.
You have an object (a rocket of constant mass $m_r$) and initial velocity $v_0$ that tries to ...
- 253
2
votes
1
answer
43
views
Trajectories of projectile based on different speeds of projection [duplicate]
So my teacher was teaching gravitation and an interesting fact that he mentioned was the trajectory of a projectile projected from Earth at a speed equal to escape velocity, is parabolic.
Also, he ...
- 21
1
vote
2
answers
140
views
Vertical trajectory of a projectile with quadratic drag
I was wondering is there is an equation (or function) that can predict the apogee time and height of an object given its current acceleration and the usual constants ( mass, drag coefficient, cross ...
11
votes
1
answer
1k
views
Why does the cross section of a metal after a hypervelocity impact look like that?
Look at this image of a cross section of a piece of (I assume) metal after a hypervelocity impact:
I understand where the crater shape comes from, but what puzzles me is the cavity near the bottom: ...
- 1,897
1
vote
1
answer
62
views
What happens to $\frac{d}{dt}\left(\hat{v}\right)$ at the highest point a projectile reaches when launched vertically upwards?
Acceleration is given by $\dot{\vec{v}} = \frac{d}{dt}\left( v \hat{v}\right) = \dot{v} \hat{v} + v \dot{\hat{v}}$.
What happens to $\dot{\hat{v}}$ when the direction of velocity flips by $180^o$?
E....
0
votes
1
answer
79
views
General solution for the motion of a 1D particle with drag
Consider a particle of mass $m$, with equation of motion
$$m\ddot{x}=-U'(x)-f(\dot{x})\dot{x}.$$
I am trying to find an equation of the form $v=g(x)$ so that we can reduce this to an integral of the ...
- 1,092
2
votes
2
answers
207
views
Need help regarding projectile motion
While studying motion in 2D, I came to know that when an object, projected with some initial velocity, making angle $0°$ with the horizontal, will have zero range.
Its a bit confusing. The object has ...
- 517