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
Katarina [22]
2 years ago
9

Si un proyectil asciende verticalmente, y después de 3 segundos alcanza su altura máxima, calcule la velocidad que lleva a la mi

tad de su trayectoria descendente
Mathematics
1 answer:
lys-0071 [83]2 years ago
8 0

Answer:

The speed is 20.8  m/s

Step-by-step explanation:

If a projectile ascends vertically, and after 3 seconds it reaches its maximum height, calculate the velocity that it carries to the middle of its downward trajectory

Let the maximum height is h and initial velocity is u.

From first equation of motion

v = u + at

0 = u - g x 3

u = 3 g.....(1)

Use third equation of motion

v^2 = u^2 - 2 gh \\\\0 = 9 g^2 - 2 gh \\\\h = 4.5 g

Let the speed at half the height is v'.

v^2 = u^2 + 2 gh \\\\v'^2 = 0 + 2 g\times 2.25 g\\\\v'^2 = 4.5\times 9.8\times9.8\\\\v' = 20.8 m/s

You might be interested in
Can someone help me with percents ?
denpristay [2]
The person HAD homework 75/100 or 75%

the remaining days he did NOT have homework , which is 25/100 or 25%
8 0
3 years ago
Read 2 more answers
If you have a cubic polynomial of the form y = ax^3 + bx^2 + cx + d and lets say it passes through the points (2,28), (-1, -5),
Marrrta [24]

Answer:

a = 3

b = 2

c = 0

d = -4

Step-by-step explanation:

Form 4 equations and solve simultaneously

28 = a(2)³ + b(2)² + c(2) + d

28 = 8a + 4b + 2c + d (1)

-5 = -a + b - c + d (2)

220 = 64a + 16b + 4c + d (3)

-20 = -8a + 4b - 2c + d (4)

(1) + (4)

28 = 8a + 4b + 2c + d

-20 = -8a + 4b - 2c + d

8 = 8b + 2d

d = 4 - 4b

Equation (2)

c = -a + b + d + 5

c = -a + b + 4 - 4b+ 5

c = -a - 3b + 9

28 = 8a + 4b + 2c + d (1)

28 = 8a + 4b + 2(-a - 3b + 9) + 4 - 4b

28 = 6a - 6b + 22

6a - 6b = 6

a - b = 1

a = b + 1

220 = 64a + 16b + 4c + d (3)

220 = 64(b + 1) + 16b + 4(-b - 1 - 3b + 9) + 4 - 4b

220 = 60b + 100

60b = 120

b = 2

a = 2 + 1

a = 3

c = -3 - 3(2) + 9

c = 0

d = 4 - 4(2)

d = -4

8 0
3 years ago
Read 2 more answers
3 less than m is greater than 9
Artist 52 [7]

Answer:

m-9 = 3 is the required expression

5 0
3 years ago
Read 2 more answers
4: Please help. What is the equation for ⨀C?
TEA [102]
It’s the second option
7 0
3 years ago
Read 2 more answers
15 POINTS!!! (16*4^3*8^8)^5 Find the answer and show work how you got it
777dan777 [17]

Answer:

2^170

Step-by-step explanation:

(16 x 4^3 x 8^8)^ 5

- start by converting it all to a common base

(2^4 x 2^3 x 2^24)^5

- calculate the product, by adding all the powers

(2^34)^5

= 2^170

5 0
3 years ago
Read 2 more answers
Other questions:
  • Find the product of 4×5
    12·2 answers
  • A soccer team has a 4.5- gallon cooler of water during games. How many 4- ounce cups can the team drink per game
    11·1 answer
  • The nurse researcher is reading about linear regression. what is linear regression
    9·2 answers
  • Increase 250ml by 85%
    12·1 answer
  • 16. Mum went shopping at the vegetable stand.
    14·1 answer
  • If f(x)=2x^2+3 and g(x)=x-2, what is (f+g)(2)?
    6·2 answers
  • Geometric proofs of segments
    14·1 answer
  • Point A is located at (1, 5), and point A′ is located at (-2, 1). What is the distance from B to B′ ?
    7·1 answer
  • The quotient of 14 and z
    8·1 answer
  • Which equation represents an exponential function with an initial value of 500?
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!