Tagged Questions
0
votes
0answers
24 views
system of tubed colliders and desired direction of movement
Imagine tube with mass M and inside it an object with mass M2 that we can force into direction x or -x. Let us say that desired direction is x. Collision between the wall at the end of the tube and ...
-4
votes
3answers
80 views
Safest place to sit in the car [closed]
I have to sit in a car which has normal seats in the front, and lounge type chairs at the back, with seatbelts only in the front. The driver drives fast, and I think I may have an accident. So, ...
0
votes
2answers
663 views
Calculating force of impact
Since $\text{force = mass}\times\text{acceleration}$,
is it right to say that an object traveling at a high
constant velocity (zero acceleration), exerts zero
force upon impact with a stationary ...
1
vote
1answer
57 views
Mean value of the force in a collision problem
I have the following problem:
A point with mass $m$ and speed $v$ collides with a fixed obstacle and penetrates it, stopping in a space $\Delta x$. Calculate $\Delta t $.
I understand the way my ...
2
votes
2answers
319 views
Small car colliding with large truck
A small car collides with a large truck. Why do both vehicles experience the same magnitude of force? Wouldn't the large vehicle experience less force than the small one?
2
votes
1answer
116 views
Swords, impacts and elasticity for a noob
So I'm a game developer and I'm trying to understand some (extremely) basic facts of impact mechanics. I had read something entitled Dynamics of Hand-Held Impact Weapons, but it was a bit too ...
1
vote
2answers
1k views
Why does a ball bounce?
If an object is acted on by equal and opposite forces then it will be in equilibrium, and it's acceleration or velocity (and so direction as well) will not be changed.
So when a ball bounces, it ...
0
votes
2answers
648 views
Two objects exert forces on each other, will the reactions affect them?
Two objects go in against each other, and then they collide, will object 1, exerting force 1, necessarily get on it a reaction equal in magnitude and opposite in direction?
EDIT:-
In my book it only ...
5
votes
1answer
257 views
What's worse, a full frontal impact or an impact at an offset?
Modern car designs have a crumple zone that absorbs most of the impact in a collision, and a strong "safety cell" in the passenger compartment that protects the passengers. These designs are put to ...
3
votes
2answers
834 views
What causes destruction in car crash?
Suppose a car crashes at a speed $v$ against a wall and comes to a stop. Now if the car crashes at $2v$, does that mean it suffers twice as much destruction, if that can be objectively measured?
If ...
5
votes
4answers
2k views
The Time That 2 Masses Will Collide Due To Newtonian Gravity
My friend and I have been wracking our heads with this one for the past 3 hours...
We have 2 point masses, $m$ and $M$ in a perfect world separated by radius r. Starting from rest, they both begin to ...
1
vote
9answers
2k views
Should you really lean into a punch?
There's a conventional wisdom that the best way to minimize the force impact of a punch to the head is to lean into it, rather than away from it.
Is it true? If so, why?
EDIT: Hard to search for ...
