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metric system
 is the standard in the world. The fundamental units include the second (s) for
 time, the meter (m) for length, and the kilogram (kg) for mass

Scalar
 A scalar is a quantity that has magnitude only.

Vector
 A vector is a quantity that has magnitude and
 direction.

Displacement
 The centre of gravity is the single point within a
 body at which the entire weight of the body is
 considered to act.

Displacement
 The displacement of a point
 B from a point A is the
 shortest distance from
 A to B, together with the
 direction.
 UNIT: m.

Mean Speed
 Mean speed
 = total distance travelled
 total time taken
 x
 t
 = Δ
 Δ
 UNIT: ms
 1.


