Cross product of two paralle or antipara...

Cross product of two paralle or antiparallel vectors is a null vector. Is this statement true or false?

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Cross product of vectors obeys

commutative law

associative law

distributive law

all the above

The cross product of two vectors gives null vector when the vectors enclose an angle to

`90^(@)`

`180^(@)`

`45^(@)`

`120^(@)`

Which one of the following is not a zero vector or a null vector ?

The displacement of a stone thrown upwards and received back by the thrower

The displacement of a particle along the circumference of a circle of radius r when it goes from one point on the circle to its diametrically opposite point

The acceleration vector of a body moving with uniform velocity along a straight line

The displacement of a stationary object from time `t_(1)=1` minute to time `t_(2)=4` minute