Physics, 28.01.2020 09:31 rudolph34

Assume you built a really big machine that could launch the projectile a “significant” distance; for instance, several hundred miles. write a brief essay discussing the issues that would need to be accounted for with a projectile with that type of range. be sure to include how those issues affect the range of the projectile.

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Answer from: xojade

First, a problem would be the sheer amount of wind resistance. If an object travels as far as even just one hundred miles it could encounter different wind patterns that could change the trajectory of the object. Second would be the size of the projectile. This creates a problem because the bigger it is, the more momentum it could potentially pick up, given that it is not too big to complete the distance. This is another problem with size, how far the projectile can actually travel. You would have to actually calculate the ideal size of said object to make sure it could actually make the distance you're looking for. hope it helps:)

Answer from: henryzx900

Trebuchet

Explanation:

I've imagined building a Trebuchet. After that idea, there were some things to consider carefully on my project.

The payload should be deadly and also win the air resistance, which brings up the fact the speed and the acceleration must be produced by a great torque by the Trebuchet's counterweight.

My medieval arm is rigid and launches payloads at a steady position so that the loss of forces could be minimal. A stationery trebuchet at the shooting is vital for a greater range, as the speed and impact of its payload would play its role as well.

No friction on its parts (pivots, joints, guide chute) so that we can improve the effectiveness of constant shots.

In addition to this, some parts of the Trebuchet must have no significant mass.

Finally, at each shot, the acceleration of the projectile could be calculated differentiating the speed of the counterweight over time.

All of these matters ought to be considered, for the prototype

Assume you built a really big machine that could launch the projectile a “significant” distance; fo

Answer from: Quest

sodium is solid at rt

Answer from: Quest

russian is not my first language, so i'm afraid i can't write out an answer in russian, but hopefully you can find a way to do so. here's my best translation of the problem: you're given a plot of a particle's position in one-dimensional space over time, and you're asked to find either the total distance traveled by the particle after 6 seconds had elapsed, or the total displacement of the particle after 6 seconds.

if you want the total distance traveled, you would first need to determine the particle's velocity as a function of time, then integrate that over the 6-second interval. we know the position function is quadratic with roots at 0 and 6, so we have

$x(t)=ax(x-6)$

where $a$ is unknown. because the position is parabolic, there is symmetry about the midpoint at $t=3$ , and we know that

$x(3)=10\implies -9a=10\implies a=-\dfrac{10}9$

so that the position function is

$x(t)=-\dfrac{10}9x(x-6)$

which means the velocity is

$v(t)=\dfrac{\mathrm dx}{\mathrm dt}=-\dfrac{20}9x+\dfrac{60}9$

then the total distance traveled is

$\displaystyle\int_{t=0}^{t=6}|v(t)|\,\mathrm dt=\left\{\int_{t-0}^{t=3}-\int_{t=3}^{t=6}\right\}v(t)\,\mathrm dt=20$

so the total distance traveled is 20 m.

on the other hand, if you want to find displacement: the particle starts at $x=0$ and ends at $x=0$ , so its displacement is 0.

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