Vector Problem: Find Magnitude & Angle of B

  • Thread starter Thread starter jjc39
  • Start date Start date
  • Tags Tags
    Vector
AI Thread Summary
To find the magnitude and angle of vector B in the equation A + B = C, start by noting the given magnitudes and angles of vectors A and C. Vector A has a magnitude of 10.1 m at 46.0° and vector C has a magnitude of 16.8 m at 17.7° from the -x direction. To determine vector B, use the relationship B = C + (-A), which involves drawing the vectors and calculating their components. The Pythagorean theorem can help find the magnitude, while the angle can be derived from the components of vector B. Completing these calculations will yield the required magnitude and angle for vector B.
jjc39
Messages
6
Reaction score
0
In the sum A + B = C, vector A has a magnitude of 10.1 m and is angled 46.0° counterclockwise from the +x direction, and vector C has a magnitude of 16.8 m and is angled 17.7° counterclockwise from the -x direction. What are (a) the magnitude and (b) the angle (relative to +x) of B? State your angle as a positive number.

Some help here please
 
Physics news on Phys.org
Did you draw it out? What is giving you trouble? You need to show some of your thoughts.
 
Yes, try drawing it out and filling in all the details regarding the angles and magnitudes. It should be much easier to see what needs to be done.
 
Yea I am knd of stuck on it I believe you have to find the magnitude by using the pythagorean theorem but calculating the angle is what is giving me trouble
 
Keep in mind that B = C + (-A) so you can draw C and -A (same as A except in the opposite direction, watch your angles!), and then since you know the angles and the magnitudes of these vectors you can get the x- and y-components and find the components of B. The angle will follow from this once you know it, as well as the magnitude.

Keep at it.
 
Kindly see the attached pdf. My attempt to solve it, is in it. I'm wondering if my solution is right. My idea is this: At any point of time, the ball may be assumed to be at an incline which is at an angle of θ(kindly see both the pics in the pdf file). The value of θ will continuously change and so will the value of friction. I'm not able to figure out, why my solution is wrong, if it is wrong .
Thread 'Voltmeter readings for this circuit with switches'
TL;DR Summary: I would like to know the voltmeter readings on the two resistors separately in the picture in the following cases , When one of the keys is closed When both of them are opened (Knowing that the battery has negligible internal resistance) My thoughts for the first case , one of them must be 12 volt while the other is 0 The second case we'll I think both voltmeter readings should be 12 volt since they are both parallel to the battery and they involve the key within what the...
Thread 'Trying to understand the logic behind adding vectors with an angle between them'
My initial calculation was to subtract V1 from V2 to show that from the perspective of the second aircraft the first one is -300km/h. So i checked with ChatGPT and it said I cant just subtract them because I have an angle between them. So I dont understand the reasoning of it. Like why should a velocity be dependent on an angle? I was thinking about how it would look like if the planes where parallel to each other, and then how it look like if one is turning away and I dont see it. Since...
Back
Top