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
Colt1911 [192]
3 years ago
13

In 1993, Wayne Brian threw a spear at a record distance of 201.24 m. (This is not an official sports record because a special de

vice was used to “elongate” Brian’s hand.) Suppose Brian threw the spear at a 35.0° angle with respect to the horizontal. What was the initial speed of the spear? 2. Find the maximum height and time of flight of the spear in problem #1.
I really don't know how to do any of this please help me :(
Physics
1 answer:
Tcecarenko [31]3 years ago
6 0

Answer:

V₀ = 45.81 m/s

H = 70.45 m

T = 5.36 s

Explanation:

The motion of the spare is projectile motion. Therefore, we will first use the formula of range of projectile:

R = V₀² Sin 2θ/g

where,

R = Range of Projectile = 201.24 m

V₀ = Initial Speed = ?

θ = Launch Angle = 35°

g = 9.8 m/s²

Therefore,

201.24 m = V₀²[Sin 2(35°)]/9.8 m/s²

V₀ = √[(201.24 m)/(0.095 m/s²)

<u>V₀ = 45.81 m/s</u>

Now, for maximum height:

H = V₀² Sin² θ/g

H = (45.81 m/s)² Sin² 35°/9.8 m/s²

<u>H = 70.45 m</u>

For the total time of flight:

T = 2 V₀ Sin θ/g

T = 2(45.81 m/s) Sin 35°/9.8 m/s²

<u>T = 5.36 s</u>

You might be interested in
a surface recieving sound is moved from it original position to a position three times farther away from the source of the sound
Delicious77 [7]
Sound intensity = 1/(r^2)

That is Sound intensity is indirectly proportional to  the distance. Therefore, sound becomes 9 times less intense.
7 0
3 years ago
PLEASE HELPPPP !!!! Scientific investigations must be well ____ to be sure the data collected will help answer the scientists qu
konstantin123 [22]
Answer-

Analyzed or conducted

Hope this helped
3 0
2 years ago
An electric current in a metal consists of moving
Alik [6]
The answer would be (A) Protons
6 0
2 years ago
What type of force is needed to accelerate an object?<br> What direction will the object accelerate?
Kay [80]
That just depends on the mass of the object and I think it will accelerate forwards

3 0
3 years ago
Read 2 more answers
A distant galaxy is determined to be 150 million light years distant and moving away from us; using the Hubble law determine its
dlinn [17]

Your question kind of petered out there towards the end and you didn't specify
the terms, so I'll pick my own.

The "Hubble Constant" hasn't yet been pinned down precisely, so let's pick a
round number that's in the neighborhood of the last 20 years of measurements:

             <em>70 km per second per megaparsec</em>.

We'll also need to know that 1 parsec = about 3.262 light years.

So the speed of your receding galaxy is

         (Distance in LY) x (1 megaparsec / 3,262,000 LY) x (70 km/sec-mpsc) =

              (150 million) x  (1 / 3,262,000) x (70 km/sec) =

                                 <em>3,219 km/sec  </em>in the direction away from us (rounded)

4 0
3 years ago
Other questions:
  • A glowing electric light bulb placed 15 cm from a concave spherical mirror produces a real image 8.9 from the mirror. the light
    7·1 answer
  • As light shines from air to another medium, i = 42.0°. The light bends toward the normal and refracts at 38.0° What is
    14·1 answer
  • Plz slv this answer​
    6·1 answer
  • A wire is 1.1 m long and 0.91 mm in cross-sectional area. It carries a current of 4.4 A when a 1.8 V potential difference is app
    14·1 answer
  • A wire loop is suspended from a string that is attached to point P in the drawing. When released, the loop swings downward, from
    11·1 answer
  • The figure shows the motion of electrons in a wire which is near the North pole of a magnet. The wire will be pushed:
    9·1 answer
  • State Newton's three laws of motion in your own words and give an example for each one that helps to explain it in everyday life
    6·1 answer
  • Two point charges, initially 3 cm apart, are moved to a distance of 1 cm apart. By what factor does the resulting electric force
    6·1 answer
  • How can I solve the following?
    14·1 answer
  • Lora (of mass 54 kg) is an expert skier. She
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!