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C. 15 kilometers D. 30 m/s
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∙ 7y ago
Taylor Isabella
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What is the physical significance of null vectors?
Zero vector or null vector is a vector which has zero magnitude and an arbitrary direction. It is represented by . If a vector is multiplied by zero, the result is a zero vector. It is important to note that we cannot take the above result to be a number, the result has to be a vector and here lies the importance of the zero or null vector. The physical meaning of can be understood from the following examples. The position vector of the origin of the coordinate axes is a zero vector. The displacement of a stationary particle from time t to time tl is zero. The displacement of a ball thrown up and received back by the thrower is a zero vector. The velocity vector of a stationary body is a zero vector. The acceleration vector of a body in uniform motion is a zero vector. When a zero vector is added to another vector , the result is the vector only. Similarly, when a zero vector is subtracted from a vector , the result is the vector . When a zero vector is multiplied by a non-zero scalar, the result is a zero vector.
Direction of vector in space is specified by?
It is an integral part of the vector and so is specified by the vector.
Cross product is not difine in two space why?
When performing the cross product of two vectors (vector A and vector B), one of the properites of the resultant vector C is that it is perpendicular to both vectors A & B. In two dimensional space, this is not possible, because the resultant vector will be perpendicular to the plane that A & B reside in. Using the (i,j,k) unit vector notation, you could add a 0*k to each vector when doing the cross product, and the resultant vector will have zeros for the i & jcomponents, and only have k components.Two vectors define a plane, and their cross product is always a vector along the normal to that plane, so the three vectors cannot lie in a 2D space which is a plane.
Why is the dot product scalar?
Because only the magnitudes are multiplied.
The components of a vector or what?
The components of a vector are magnitude and direction.
Which of the following could not be vector magnitudes?
14 meters
What could not be vector magnitudes?
5 hours ^_^
Which of the following values could possibly be vector magnitudes meaning that combined with a direction they could become vector quanities?
6 miles5 meters30 kilometers/hourappexx30 kilometers/hour5 meters6 miles
What could be vector magnitudes?
30 m/s and 15 kilometers
Can the magnitude of the resultant of two vector be greater than the sum of magnitudes of indivisual vector?
No.
Can a vector have zero magnitudes if one of its component is not zero?
No. The magnitude of a vector can't be less than any component.
Why a unit vector is aone type of vector but a vector is not a unit vector?
A unit vector is a vector whose magnitude is one. Vectors can have magnitudes that are bigger or smaller than one so they would not be unit vectors.
Can A plus B equal zero when A and B have nonzero magnitudes?
If 'A' and 'B' are vectors, and their magnitudes are equal, andtheir directions are opposite, then their vector sum is zero.
Can the magnitude of the resultant of two vector be greater than the sum of magnitudes of individual vectors?
No.
What is the largest resultant vector that you could make using two vectors of magnitudes 10 Newtons and 9 Newtons?
19 Newtons They need to be in the same direction for the highest resultant
For two vector quantities to be equal they must have the same direction and the same?
Same direction and equal magnitudes.
Can a vector be less than its magnitude?
For a start, you can't compare a vector with a scalar, so you can't really compare a vector with its magnitude, either. To say which is larger, you can't even compare one vector with another - you can only compare their magnitudes.
