2007-09-20

Nota Fizik: Understanding Scalar and Vector Quantities

Scalar quantities: Quantities that have magnitude only. ( Speed, mass, distance)

Example:

For example speed has unit of ms^-1. but it has no direction.

Mass is kg but we don't know the direction.

Distance is 2km but no direction.

Vector quantities: Quantities that have magnitude and direction. (Velocity, Weight, Displacement)

Example:

Velocity unit is ms^-1 but we must state the direction that is whether from right to left.

Weight unit is Kg but the direction is towards the gravity pull of the earth.

Displacement is 2km but to the north from the point of reference.

10 comments:

Anonymous said...

gives some examples...
more examples easy to understand...
tq

jayt91 said...

gives some examples...
more examples easy to understand...
tq

Anonymous said...

gives some examples...
more examples easy to understand...
tq

Anonymous said...

Do you tutor?

Anonymous said...

Do you tutor?

Dean James said...

Just leave your questions here. What do you mean by do you tutor?

Anonymous said...

what's the difference in measuring mass and weight?

can you give more examples?

physics is a difficult subject...really

Anonymous said...

Khan Academy have some video about physics so please check it out if you want to learn and understand it as clear as crystal.

O Dean said...

mass is a scalar quantity it doesn't involve direction. It's just the measurement of the amount of "substance or matter" present in an object (visible or invisible) Remember: Air has mass as well

Weight is more of a vector quantity as it involves the mass and the gravitational force exerted on the object. So if you are on earth you have weight because the earth's gravitational force exerts its effect on your mass. Hence the measurement of weight is in Newton. Weight = mass (kg) x gravity constant

Anonymous said...

please also explain in 'Mathematically'