S3- Chap 1 physical quantities, units and measurements Flashcards
1
Q
Def physical quantity
A
It is a quantity that can be measured. It consists of a numerical magnitude and a unit.
2
Q
Def oscillation
A
Each complete to-and-fro motion is one oscillation.
3
Q
Def period
A
The period of a simple pendulum is the time taken for one complete oscillation.
4
Q
Def scalar quantities
A
They are physical quantities that have only magnitude.
5
Q
Def vector quantities
A
They are physical quantities that have both magnitude and direction.
6
Q
Def speed
A
It is the distance moved per unit time.
7
Q
Def velocity
A
It is the rate of change of displacement.
