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We're not sure what you have in mind when you say "counteract". But two vectors

can certainly add up to zero, if their magnitudes are equal and their directions are

different by exactly 180 degrees. In that case, they have the same effect as if they

were both not there at all.

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14y ago

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When are magnitudes of two vectors added?

The magnitudes of two vectors are added when the vectors are parallel to each other. In this case, the magnitude of the sum is equal to the sum of the magnitudes of the two vectors.


What is the condition when two vectors are addition and subtraction are same magnitude?

The condition is the two vectors are perpendicular to each other.


Is the sum and difference of two perpendicular vectors have same lengyhs and also perpendicular to each other?

The sum and difference of two perpendicular vectors are the same in length, but are not perpendicular unless the vectors are the same size. If they are the same size they are perpendicular, other wise they are not perpendicular.


What does it mean when the dot product between two vectors is zero?

When the dot product between two vectors is zero, it means that the vectors are perpendicular or orthogonal to each other.


What is the angle needed for the smallest resultant of two vectors?

The smallest resultant of two vectors is the sum of two equal vectors which make an angle of 180 degrees among each other.


Is it possible for two vectors with different magnitudes to totally cancel each other?

no


How great is the resultant of two equal-magnitude vectors at right angles to each other?

Let two equal magnitude vectors be 'X'.. Then, resultant=1.414X


If two vectors are perpendicular to each other then the resultant what?

If two vectors are perpendicular to each other, their dot product will be zero. This means that the angle between the two vectors is 90 degrees. When adding two perpendicular vectors together, the resultant vector will be the vector sum of the two original vectors. The magnitude of the resultant vector can be calculated using the Pythagorean theorem, and its direction can be determined using trigonometry.


How one arises at null vector?

When you have two or more vectors that cancel each other out.


When do two forces that are applied to an object counteract each other?

Two forces counteract each other when they have the same magnitude but act in opposite directions. This results in a net force of zero, causing the object to remain at rest or move at a constant velocity.


Can the resultant of two vectors be equal to zero?

Yes. A vector has magnitude and direction. If the vectors have equal magnitude and directly opposite directions their sum will be zero.


Can any vector be represented by two other vectors that are right angels to each others?

Yes. This is the basis of cartesian vector notation. With cartesian coordinates, vectors in 2D are represented by two vectors, those in 3D are represented by three. Vectors are generally represented by three vectors, but even if the vector was not in an axial plane, it would be possible to represent the vector as the sum of two vectors at right angles to eachother.