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
Sever21 [200]
2 years ago
7

A shell is launched with an initial velocity at an angle of 40.0° above horizontal

Physics
1 answer:
olasank [31]2 years ago
7 0

Answer:

122.17 m/s

Explanation:

x cos 40 = horizontal velocity

1500 m / x cos 40   = time in the air =<u> 1958.11 / x</u>

x sin 40 = vertical velocity

 find when shell vertical velocity = 0 (this is max height....1/2 way through its flight)  , the time when it hits the ground will be twice this...  

   0 =  x sin 40 - 9.8 t

  t =  x sin40 / 9.8        time in the air is twice this = .13118<u> x</u>

<u />

Equate the two times from above to solve for x

1958.11/ x  =  .13118 x

x = 122.17 m/s

You might be interested in
A harmonic wave is traveling along a rope. It is observed that the oscillator that generates the wave completes 43.0 vibrations
blsea [12.9K]

Answer:

0.218

Explanation:

Given that

Total vibrations completed by the wave is 43 vibrations

Time taken to complete the vibrations is 33 seconds

Length of the wave is 424 cm = 4.24 m

to solve this problem, we first find the frequency.

Frequency, F = 43 / 33 hz

Frequency, F = 1.3 hz

Also, we find the wave velocity. Which is gotten using the relation,

Wave velocity = 4.24 / 15

Wave velocity = 0.283 m/s

Now, to get our answer, we use the formula.

Frequency * Wavelength = Wave Velocity

Wavelength = Wave Velocity / Frequency

Wavelength = 0.283 / 1.3

Wavelength = 0.218

7 0
2 years ago
A box with a mass of 2 kg accelerates in a straight line
mihalych1998 [28]

Answer: 16N

Explanation:

Given that:

mass of box M= 2 kg

Initial speed V1 = 4 m/s

Final speed V2 = 8 m/s

Time taken T= 0.5 s

Average strength of this force F = ?

Now, recall that Force is the rate of change of momentum per unit time

i.e Force = momentum / time

Hence, F = M x (V2 - V1)/T

F = 2kg x (8 m/s - 4 m/s) / 0.5s

F = 2kg x (4 m/s / 0.5s)

F = 2kg x 8 m/s/s)

F = 16N

Thus, the average strength of this

force is 16 newton.

7 0
3 years ago
a grape and apple and a watermelon are arranged at the corners of a triangle so that each piece of fruit is three meters away fr
777dan777 [17]
-- There are three pairs of mass with gravitational forces between them.

-- The distances between the masses are the same for each pair.

-- The only other quantity that determines the strength of the gravitational
force is the product of the masses.

-- The product of the masses is greatest for the apple and the watermelon,
so the strength of the gravitational force between them is the greatest.
5 0
2 years ago
In an orbiting space shuttle, you are handed two identical boxes, one filled with sand and the other filled with feathers. How c
Aleks04 [339]

Explanation:

Simply, shake the boxes. The box that is difficult to shake will be the sand and the box that will be easier will be the feathers.

3 0
3 years ago
Is it true or false Objects with different masses can’t have the same momentum.
xenn [34]

Answer:

true

Explanation:

3 0
2 years ago
Read 2 more answers
Other questions:
  • Find the kinetic of a 0.1 kilogram toy truck moving at a speed of 1.1 meters per second
    8·1 answer
  • Three long, straight wires are carrying currents that have the same magnitude. In C the current is opposite to that in A and B.
    5·1 answer
  • How much heat has to be added to 508 g of copper at 22.3°C to raise the temperature of the copper to 49.8°C? (The specific heat
    15·1 answer
  • James took two pea plants, placing one in a dark closet and the other on a sunny window sill. both are located in air-conditione
    15·1 answer
  • Two basketball players are essentially equal in all respects. (They are the same height, they jump with the same initial velocit
    15·1 answer
  • The gravitational force of Earth is causing volcanoes on the moon. <br> True<br><br> False
    14·2 answers
  • Whats the definition of deposition​
    15·2 answers
  • A group of students gather for some fun during their summer break from school. Kendall and Jacoby have a water balloon fight dur
    10·1 answer
  • Which scenario did not include a chemical change?
    12·1 answer
  • Please help me with these 2 questions :D
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!