Prashant Kirad
MOTION
IN A PLANE
Class-11th
, Prashant Kirad
Physical Quantities
Scalar Quantity Vector Quantity
A physical quantity that has only A physical quantity that has both
magnitude (value) but no direction. Do not magnitude and direction. Follows the laws
follow the laws of vector algebra. of vector algebra.
, Prashant Kirad
Q. Why is electric current not considered a
vector quantity even though it has a direction?
Electric current is not a vector quantity because
it does not follow vector addition rules, even
though it has a defined direction.
, Prashant Kirad
Basics of Vector
Representation of a Vector
⟶
Vectors are typically denoted by symbols with an arrow on top.
Parts of a Vector:
A
Tail: Starting point of the vector. Tail Head
Head: Endpoint showing the direction. Magnitude
⟶
|A|: Magnitude (length).
^
∣∣
⟶ ⟶
^
A= A A A: Unit vector indicating direction.
Direction: Indicated by where the arrow points.
MOTION
IN A PLANE
Class-11th
, Prashant Kirad
Physical Quantities
Scalar Quantity Vector Quantity
A physical quantity that has only A physical quantity that has both
magnitude (value) but no direction. Do not magnitude and direction. Follows the laws
follow the laws of vector algebra. of vector algebra.
, Prashant Kirad
Q. Why is electric current not considered a
vector quantity even though it has a direction?
Electric current is not a vector quantity because
it does not follow vector addition rules, even
though it has a defined direction.
, Prashant Kirad
Basics of Vector
Representation of a Vector
⟶
Vectors are typically denoted by symbols with an arrow on top.
Parts of a Vector:
A
Tail: Starting point of the vector. Tail Head
Head: Endpoint showing the direction. Magnitude
⟶
|A|: Magnitude (length).
^
∣∣
⟶ ⟶
^
A= A A A: Unit vector indicating direction.
Direction: Indicated by where the arrow points.
