1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Yanka [14]
3 years ago
13

A gun has a muzzle speed of 90 meters per second. What angle of elevation should be used to hit an object 150 meters away? Negle

ct air resistance and use g=9.8m/sec2 as the acceleration of gravity.
Physics
1 answer:
Artist 52 [7]3 years ago
7 0

Answer:

θ₀ = 84.78° (OR) 5.22°

Explanation:

This situation can be treated as projectile motion. The parameters of this projectile motion are:

R = Range of Projectile = 150 m

V₀ = Launch Speed of Projectile = 90 m/s

g = 9.8 m/s²

θ₀ = Launch angle (OR) Angle of Elevation = ?

The formula for range of a projectile is given as:

R = V₀² Sin 2θ₀/g

Sin 2θ₀ = Rg/V₀²

Sin 2θ₀ = (150 m)(9.8 m/s²)/(90 m/s)²

2θ₀ = Sin⁻¹ (0.18)

θ₀ = 10.45°/2

<u>θ₀ = 5.22°</u>

Also, we know that for the same launch velocity the range will be same for complementary angles. Therefore, another possible value of angle is:

θ₀ = 90° - 5.22°

<u>θ₀ = 84.78°</u>

You might be interested in
Which are characteristics of fungi? Check all that apply.
Inessa05 [86]

they are eukaryotes that have cell walls, are heterotrophs that feed by absorbing their food, and use spores to reproduce.

3 0
2 years ago
Which of the following is not true of a conductor? A. It is used in electrical circuits. B. It allows easy passage of moving cha
Oksi-84 [34.3K]
Three of the statements are true.  'D' is false.
Glass and rubber are excellent insulators, total duds as conductors.
8 0
3 years ago
Read 2 more answers
Resonance occurs when an object vibrating at or near the resonant frequency of a second object to vibrate. What form of waves ar
Ivanshal [37]

Answer:

Resonance depends on objects, this may happen for example when you play guitar in a given room, you may find that for some notes the walls or some object vibrate more than for others. This is because those notes are near the frequency of resonance of the walls.

So waves involved are waves that can move or affect objects (in this case the pressure waves of the sound, and the waves that are moving the wall).

this means that the waves are mechanic waves.

Now, in electromagnetics, you also can find resonance frequencies for electromagnetic waves trapped in things called cavities, but this is a different topic.

8 0
3 years ago
Atmospheric pressure is greater at the base of a mountain than at
aliina [53]

At the top of the mountain, when he tightens the cap onto the bottole, there is some water and some air inside the bottle.  Then he brings the bottle down to the base of the mountain.

The pressure on the outside of the bottle is greater  than it was when he put the cap on.  If anything could get out of the bottlde, it would. But it can't . . . the cap is on too tight. So all the water and all the air has to stay inside, and anything that can get squished into a smaller space has to get squished into a smaller space.

The water is pretty much unsquishable.

Biut the air in there can be <em>COMPRESSED</em>.  The air gets squished into a smaller space, and the bottle wrinkles in slightly.

8 0
3 years ago
What relationship exists betwen air resistance and acceleration of falling objects
ololo11 [35]
They both make a thing go faster and slower but the relationship is force.
5 0
3 years ago
Read 2 more answers
Other questions:
  • If a speaker gives a sound intensity of 10−6w/m2 at a certain point, what is the sound intensity level β at that point?
    10·1 answer
  • You are standing at a subway platform when a subway passes, sounding its whistle. If you observe the whistle to be at 12750Hz wh
    5·1 answer
  • What healthy snack can provide protein after physical activity?
    5·1 answer
  • Why does water break apart rock when it freezes?
    14·2 answers
  • Are stained glass windows transparent, opaque or translucent
    11·1 answer
  • When a light ray is reflected from a surface, the ratio of the angle of incidence to the angle of reflection is
    15·1 answer
  • One small thing you eat it you atomicly started crry. what is it.​
    12·1 answer
  • 1- Kilogram is a unit of _____________ in ______________ system ?
    9·1 answer
  • What kind of injury would most likely come from an unfortunate slide into home in a baseball game?
    7·1 answer
  • four particles connected by rigid rods of negligible mass where y1 = 5.70 m. the origin is at the center of the rectangle. The s
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!