If n^ is unit vector in direction of A→ then:
Correct answer: A. n^= A→/|A|
- A. n^= A→/|A|
- B. n^= (A.|A|)-
- C. n^= n^A→
- D. n^= A/A-
Explanation
n^= A→/|A|: This equation represents the unit vector n^ in the direction of the vector A→. To obtain n^, we divide the vector A→ by its magnitude |A|, which gives us the direction of the vector without changing its magnitude. Overall, the correct equation for the unit vector n^ in the direction of the vector A→ is n^= A→/|A|. This equation gives us the direction of the vector A→ without changing its magnitude, as the unit vector has a magnitude of 1.
This question appeared on the ETEA MDCAT 2009 paper, which you can sit online with every answer explained.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About Addition of Vectors
Vector addition combines directed quantities using the head-to-tail, parallelogram and component methods. Work includes finding the resultant magnitude and direction for two or more vectors, resolving vectors into perpendicular components, and distinguishing vector addition from scalar addition, where direction has no role.
Practise Vectors and Equilibrium
431 free Vectors and Equilibrium MCQs from Physics, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Physics questions like this
Physics is on 16 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Addition of Vectors questions
The resultant of a 6N force and an 8N force acting at right angles to each other is of the magnitude:
If there are coplanar forces acting on a body to keep it in equilibrium, then these forces are:
Two forces having magnitude 3.5N and 5.5N are acting on a body. Which one of the following can not be the resultant of their possible sum:
Two concurrent forces have a maximum resultant of 45N and minimum resultant of 5N. What is the magnitude of each of these?
How are the two vectors of the same magnitude oriented to get a resultant of the same magnitude?
The minimum number of unequal forces whose vector sum can be zero is