Define unit vector, null vector and posi-tion vector .

For given vectors veca=2hati-hatj+2hatkandvecb=-hati+hatj-hatk , find the unit vector in the direction of the vector veca+vecb .

Define vector product of two vectors and write any two properties of it.

Which of the following is a null vector (a) velocity vector of a body moving in a circle with a uniform speed (b) velocity vector of a body moving in a straight line with a uniform speed (c) position vector of the origin of the rectangular coordinate system (d) displacement vector of a stationary object

Find unit vector in the direction of vector bar(a) = (2bar(i)+3bar(j)+bar(k))

The unit vector perpendicular to each of the vectors 2i - j + k and 3i + 4j - k is