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Scilla [17]
2 years ago
7

You and your friends find a rope that hangs down 15 m from a high tree branch right at the edge of a river. You find that you ca

n run, grab the rope, swing out over the river, and drop into the water. You run at 2.0 m/s and grab the rope, launching yourself out over the river.
Mathematics
1 answer:
Crazy boy [7]2 years ago
6 0

Answer:

Vertical angle=9.5°

Time to reach maximum height = 1.24seconds

Step-by-step explanation:

The maximum distance x is reached when rope swings to a maximum height, maximum height is gotten from the equation KE= 1/2MU^2 = MgH = MgL= Mgl(1- cos theta.

Where theta is the vertical angle, U=2m/s and L= 15m

2gl -2glcostheta=U^2

2gl U^2=2gl cos theta

But theta= Acos(1- U^2)/2gl

Acos(1-/(2×9.8×15)

Theta =9.5°

Maximum height li given by

Lsintheta

But X= UxT

T=X/UX= Lsintheta/U = 15sin9.5 /2 =1.24seconds

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3 years ago
What is the solution to -3x<9
GaryK [48]
-3x<9. The way to figure this out is to divide by -3 to get x by itself. Remember, when dividing by a negative, you need to flip the inequality sign.
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I hope this helps!
7 0
3 years ago
Find 118% of 19 could really use some help late bloomer 
Zanzabum
Hello, 

<span>to find the percent of a number what we have to do is to multiply the number by de percent that we want to know and divide by 100, so:
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19* \frac{118}{100} =22.42

Answer: 118% of 19 is 22.42
7 0
3 years ago
Read 2 more answers
Opal makes $15 per hour working for a photographer. She also coaches a competitive soccer team for $10 per hour.
Jlenok [28]

The system of inequalities that represents the given situation are x + y ≤ 20 and 15x + 10y ≥ 90.

The parameters needed to model the inequalities;

  • amount made by Opal working for a photographer = $15 per hour
  • amount made in the soccer team = $10 per hour
  • minimum amount Opal needs to make a week = $90
  • maximum number of hours Opal needs to work = 20 hours

Let the number of hours Opal works for a photographer = x

Let the number of hours Opal works in soccer team = y

The first system of inequality in the given situation is represented as;

x + y ≤ 20

The second system of inequality in the given situation is represented as;

15x + 10y ≥ 90

Thus, the system of inequalities that represents the given situation are x + y ≤ 20 and 15x + 10y ≥ 90.

learn more here: brainly.com/question/9774970

7 0
2 years ago
I NEED HELP ON THIS SO BAD I WILL GIVE CROWN FOR ANSWER
Murljashka [212]

Answer: do 150ml*15 tubes is 2,250 ml

2,250/1000 is 2.25L (1L =1000ml is multiply by 1000)

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