Measuring Methods

Distance: is the measure of how far an object is .

1 Kilometer = 1000 meter (SI unit)

1 meter = 100 centimeter

1 centimeter = 10 millimeter

Displacement: is the distance in a given direction.

Speed “scalar quantity “: is the rate of change distance moved in unit time.

S = Dd/Dt

S = (m/s)

Dd = df – di = (m)

Dt = tf – ti = (s)

Velocity: is the speed in a given direction.

V = Dd/Dt

V = +,-(m/s)

Dd = df – di = (m)

Dt = tf – ti = (s)

Acceleration: is the ratio of velocity.

a = DV/Dt

a = +,-(m/ s² )

DV = Vf – Vi = +,-(m/s)

Dt =tf – ti = (s)

However, due to Newton’s Second Law:

a = F/m

a = +,-(m/ s² )

F = (N)

m = (kg)