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Elodia [21]
3 years ago
6

Assume you built a really big machine that could launch the projectile a “significant” distance; for instance, several hundred m

iles. 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.

Physics
2 answers:
sasho [114]3 years ago
4 0

Answer:

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

Gwar [14]3 years ago
3 0
<span>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:)</span>
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lesya [120]

Answer:

a)   9 - 1.2 = 7.8 N

b) Since the force exerted by the box is it's weight, it acts in a downward direction. So the box will exert a force downward (perpendicular to the horizontal surface).

Explanation:

A 9N block would exert 9N of normal force on the horizontal plane under normal conditions. But in this case, we have a spring taking away some of the force by applying an upward force on the box.

So the force exerted by the box on the surface would now be:

a)   9 - 1.2 = 7.8 N

b) Since the force exerted by the box is it's weight, it acts in a downward direction. So the box will exert a force downward (perpendicular to the horizontal surface).

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3 years ago
(d) Suppose you use a spring to launch a payload horizontally from the asteroid so that the payload ends up far from the asteroi
nydimaria [60]

Answer:

ks= 133.2 N/m

Explanation:

  • Assuming that we can neglect the gravitational potential energy of the mass, and that no other forces acting on the payload, total mechanical energy must be conserved.
  • This energy, at any time, is part elastic potential energy (stored in the spring) and part kinetic energy.
  • When the spring is initially compressed, the payload is at rest, so all energy is elastic potential.
  • Once the spring has returned to its natural state, all this elastic potential energy must have been turned into kinetic energy.
  • If the payload is launched horizontally, and no gravity is present,this means that its final speed will be horizontal only also, according to Newton's First Law.
  • So, we can write the following equation:

       \Delta U + \Delta K = 0 (1)

  • where ΔU = -1/2*k*(Δx)²  (2)
  • and ΔK = 1/2*m*v² (3)
  • Replacing in (2) and (3) by the givens, and simplifying, we can find the stiffness ks as follows:

       k_{s} =\frac{m*v^{2}}{\Delta x^{2}} = \frac{29 kg*(3m/s)^{2}}{(1.4m)^{2}} = 133.2 N/M (4)

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2 years ago
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That would be the exoskeleton!
6 0
3 years ago
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Zigmanuir [339]

The distance traveled by the arrow and horizontal velocity are directly proportional, thus when the distance increases, an increase in initial velocity will allow the arrow to hit the target.

<h3>Time of motion of the projectile</h3>

If the horizontal distance the projectile would travel before hitting the target is 70.67 m, the time of motion of the projectile is calculated as;

X = Vx(t)

t = X/Vx

t = X/Vcosθ

t = (70.67) / (45 x cos10)

t = 1.6 s

When the archery target is moved further away from the archer, the archer needs increase the initial velocity of the arrow assuming the angle of projection is constant.

Since the distance and horizontal velocity are directly proportional to each other, thus when the distance increases, an increase in initial velocity will allow the arrow to hit the target.

Learn more about velocity of projectile here: brainly.com/question/12870645

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xz_007 [3.2K]

Once again, you'd need to know that there are 60 seconds in a minute, and 60 minutes in an hour :)

I'd say converting the minimum wage into cents rather than dollars would make this problem a lot easier. $8.25 = 825 ¢.

So if this person is earning 825 ¢ in an hour, we should divide 825 by 60 to find out how much they're making in a minute:

825 ÷ 60 = 13.75 ¢

Now, we just need to divide by 60 again to work out how much that is in seconds:

13.75 ÷ 60 = 0.229 ¢

So to answer your question, this person would make 0.229 ¢ a second (¢/s) on the job with minimum wage. Converting this value to dollars wouldn't be viable (as it'd just be $0.00, so it's best to leave the answer in cents!)

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4 years ago
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