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
Ivahew [28]
3 years ago
9

A car travels 32 km due north and then 46 km in a direction 40° west of north. Find the direction of the car's resultant vector.

[?] Round to the nearest hundredth.
Mathematics
1 answer:
tatuchka [14]3 years ago
6 0

Answer:

Step-by-step explanation:

This requires some serious work before we even begin. First off, we will convert the km to meters:

32 km = .032 m

46 km = .046 m

And then we have to deal with the angle given as 40 degrees west of north. An angle 40 degrees west of north "starts" at the north end of the compass and moves towards the west (towards the left in a counterclockwise manner) 40 degrees. That means that the angle that is made with the negative x axis is a 50 degree angle. BUT the way angles are measured in standard form are from the positive x-axis, therefore:

40 degrees west of north = 50 degrees with the negative x axis = 130 degrees with the positive x axis. 130 is the angle measure we use. Phew! Now we're ready to start. Adding vectors requires us to use the x and y components of vectors in order to add them.

A_x=.032cos90.0 so

A_x=0 (the 90 degrees comes from "due north")

B_x=.046cos130 so

B_x=-.030 and if we add those to get the x component of the resultant vector, C:

C_x=-.030   And onto the y components:

A_y=.032sin90.0 so

A_y=.032

B_y=.046sin130 so

B_y=.035 and if we add those together to get the y component of the resultant vector, C:

C_y=.067  Note that since C_x is negative and C_y is positive, the resultant angle (the direction) will put us into QII.

We find the magnitude of C:

C_{mag}=\sqrt{(-.030)^2+(.067)^2}

We will round this after we take the square root to the thousandths place.

C_{mag}=.073m and now for the angle:

\theta=tan^{-1}(\frac{.067}{-.030}) which gives us an angle measure of -67, but since we are in QII, we add 180 to that to get that, in sum:

The magnitude of the resultant vector is .073 m at 113°

You might be interested in
(35 points) GEOMETRY PROOF
Lisa [10]

Please give me brainlest

click this link.

https://artofproblemsolving.com/wiki/index.php/2019_AMC_8_Problems/Problem_24

or copy it then paste it in search.

5 0
3 years ago
Please help me with my math problem!!Thank you!! :)
vova2212 [387]

Check the picture below.

6 0
3 years ago
Simplify.
aleksley [76]
First multiply (-5/6) and (1/6) to get
-  \frac{5}{36}
then you subtract that from (8/9) to get
\frac{27}{36}
final answer is
\frac{3}{4}
5 0
2 years ago
594 7/25 + 89 37/100=<br> please help with this math problem
stich3 [128]
594 7/25 converted into decimal is 594.28, 89 37/100 converts to 89.37. Add 594.28 and 89.37 together and we get out final answer of 683.65. Convert that back into fraction form and we get (683 13/20) <--- Final Answer
5 0
3 years ago
What are the quadrants of the standard (x,y) coordinate plane below that contain points on the graph of the equation 4x - 2y = 8
miv72 [106K]

Answer: I III and IV

Step-by-step explanation:

The line intersects the x axis at (2,0) and the y axis at (0,-4) so the line goes through quadrants 1 3 and 4 so the answer is the middle or the 3rd from top

7 0
2 years ago
Other questions:
  • A street sign is 87 inches tall. How tall is it in feet and inches?
    12·2 answers
  • Charmaine drinks 3 1/2 pints of milk a day. How much is this in cups? Write your answer as a whole number or a mixed number in s
    8·1 answer
  • The two triangles are similar. What is the value of x? Enter your answer in the box.
    10·2 answers
  • The following table shows a portion of a four-year amortization schedule. A 4-year amortization schedule. The loan amount or pri
    12·1 answer
  • The perimeter of a triangle is 12in. After a dilation, the perimeter is now 60in. What is the scale factor?
    13·2 answers
  • A number plus 12 is 36. write an equation and use equation to solve
    10·2 answers
  • What is factorisation ​
    9·1 answer
  • A chef uses 5 pounds of flour to bake 120 blueberry muffins.
    12·2 answers
  • Can someone pls help me
    11·2 answers
  • 24 is 25% of what number?<br><br> Please help!
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!