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PolarNik [594]
3 years ago
13

Two vectors have a sum A and their difference is B.If A=B then,the angle between the two vectors is

Physics
1 answer:
Dovator [93]3 years ago
4 0

Answer:

D.90°

Explanation:

First remember that the magnitude of a vector , lets say T is the square of the dot product with itself.

This is to say

|T|=√(T×T)

Assume A≠0 and B≠0 then

Square both sides of the below equation

|A+B|²=|A-B|²

(A+B)²=(A-B)²

A(A+B)+B(A+B)=A(A-B)-B(A-B)

A²+AB+AB+B²=A²-AB-AB+B²

A²+2AB+B²=A²-2AB+B²

You notice that  it simplifies to

2AB= -2AB

This means that A×B =0

Hence the angle between the vectors should be 90°

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A 1.00 -kg object slides to the right on a surface having a coefficient of kinetic friction 0.250 (Fig. P8.62a). The object has
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<h3>What is the distance?</h3>
  • The separation of one thing from another in space; the distance or separation in space between two objects, points, lines, etc.; remoteness. The distance of seven miles cannot be accomplished in one hour of walking.
  • Learn how to use the Pythagorean theorem to get the separation between two points using the distance formula. The Pythagorean theorem can be rewritten as d==(((x 2-x 1)2+(y 2-y 1)2)
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