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
Aloiza [94]
3 years ago
7

Can you please help me figure out the work for the missing quantities?

Physics
1 answer:
marysya [2.9K]3 years ago
8 0

Answer: set up proportions

Explanation:

You might be interested in
Julie throws a ball to her friend Sarah. The ball leaves Julie's hand a distance 1.5 meters above the ground with an initial spe
Lisa [10]

Answer:

1) v₀x = 13.76 m/s

2) v₀y = 19.66 m/s

3) ymax = 21.199 m

4) X = 55.1746 m

5) and 6) y = 18.4 m

Explanation:

1) v₀x = v₀*Cos α = 24 m/s* Cos 55° = 13.76 m/s

2) v₀y = v₀*Sin α = 24 m/s* Sin 55° = 19.66 m/s

3) ymax = y₀ + (v₀y²/(2g)) = 1.5 m + ((19.66 m/s)²/(2*9.81 m/s²)) = 21.199 m

4) We can use this equation

y = y₀ + (tan α)*x – (g / (2* v₀x²))*x²

where y = y₀ = 1.5 m

then

1.5 = 1.5 + tan (55°)*x - (9.81 / (2* (13.76)²))*x²

⇒   0.02588 x² - 1.42815 x = 0

Solving this equation we get

x₁ = 0     and    x₂ = 55.1746 m

The distance between the two girls is 55.1746 m

5) and 6) If   v₀x = 15 m/s = vx   and   ymax = 24 m

y = ?   when x = (xmax/2)

ymax = y₀ + (v₀y²/(2g)) ⇒ v₀y = √(2g*(ymax - y₀))

⇒ v₀y = √(2(9.81 m/s²)(24 m - 1.5 m)) = 21.01 m/s

then we get α' as follows

α' = tan⁻¹(v₀y/v₀x) = tan⁻¹(21.01 m/s/15 m/s) = 54.47°

v₀ = √(v₀x² + v₀y²) = √((15 m/s)² + (21.01 m/s)²) = 25.81 m/s

Now we can apply the equation of the path

y = ymax - ((gx²)/(2v₀²))

⇒  y = 24m - ((9.81)(55.1746/2)²/(2*25.81²))

⇒  y = 18.4 m

7 0
3 years ago
Read 2 more answers
Sam and his Dad went grocery shopping. As they went up and down the aisle, adding items to their cart, something changed. The ca
Amanda [17]
B)
The speed of the cart changed because it stopped. 

Hope I could help!
-Marshy
8 0
3 years ago
Read 2 more answers
If you want to make a strong battery, should you pair two metals with high electron affinities, low electron affinities, or a mi
zalisa [80]

A mix

Explanation:

A battery is an electrochemical cell that converts chemical energy into electrical energy. The chemical reactions in a battery ensures that current is produced.

  • A battery is made up of two electrodes which are the cathode and anode.
  • The cathode is the positive electrode and the anode is the negative one.
  • These electrodes are made up of metals.
  • Electrons moves from the anode to the cathode and current flows from cathode to anode.
  • At the anode oxidation occurs because electrons are produced here.
  • It needs to have low electron affinity.
  • At the cathode where reduction occurs, the electron affinity must be high.
  • This is the driving force for the production of electricity in electrochemical cells.

Learn more:

Battery brainly.com/question/8892837

#learnwithBrainly

6 0
2 years ago
the record for a ski jump is 180 m set in 1989. Assume the jumper comes off the end of the ski jump horizontally and falls 90 m
Mashutka [201]
Let's write the equations of motion on both x- (horizontal) and y- (vertical) axis. On the x-axis, it's a uniform motion with constant velocity vx. On the y-axis, it is a uniformly accelerated motion with initial height h=90 m and acceleration of g=9.81 m/s^2 pointing down (so with a negative sign):
S_x(t)=v_x t
S_y(t)=h- \frac{1}{2} gt^2

First, let's find the time at which the jumper reaches the ground. This happens when Sy(t)=0:
0=h- \frac{1}{2} g t^2
and so 
t= \sqrt{ \frac{2h}{g} }= \sqrt{ \frac{2\cdot 90m}{9.81 m/s^2} }=4.28 s

Then, we can find the horizontal speed. In fact, we know that at the time t=4.28 s, when the jumper reached the ground, he covered exactly 180 m, so Sx=180 m. Using this into the law of motion in x, we find
v_x= \frac{S_x}{t} = \frac{180 m}{4.28 s} =42 m/s

8 0
2 years ago
What are three disadvantages of making and using plastic?
Gemiola [76]
Harmful to the environment
non bio degradable
harmful chemicals  <span />
4 0
3 years ago
Read 2 more answers
Other questions:
  • Someone help please !!?
    7·1 answer
  • Is baking soda less dense or more dense than water?
    6·1 answer
  • With what tension must a rope with length 2.20 m and mass 0.150 kg be stretched for transverse waves of frequency 43.0 hz to hav
    8·1 answer
  • Which renewable resource produces the most electricity in the United States? geothermal energy solar energy wind power hydroelec
    13·2 answers
  • How much net force must be applied to a 250 kg boat to cause an acceleration<br> of +1.8 m/s/s?
    11·1 answer
  • Power describes the
    5·2 answers
  • How does radiation differ from conduction?
    5·1 answer
  • Please help lol<br> im on my sisters acc btw
    7·1 answer
  • The total quantity of an object's matter is called its
    9·2 answers
  • What is radioactivity?​
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!