Class 11 NEET Physics Motion in a Plane Questions

Let

→

A

×

→

B

=

→

C

The cross product of

→

B

and

→

A

is perpendicularto the plane containing

→

A

and

→

B

i.e. perpendicular to

→

A

.
If a dot product of this cross product and

→

A

is taken, as the cross product is perpendicular to

→

A

,

→

C

×

→

A

=0
Therefore product of (

→

B

×

→

A

).

→

A

×=0.