Week - 1 - Consistency of Units

Aim : To convert the SI unit in different format.

1) Kg cm ms

i) 1kg = 1kg

1m = 100cm

1sec = 1000ms

ii) Force(N) = mg

= (kg*cm)/ms^2

= (1*100)/1000^2

= 1*10^-4 N

iii)Stress (Pa) = N/m^2

= ((kg*cm)/ms^2)/cm^2

= ((1*100)/1000^2)/100^2)

=1*10^-8 N/cm2

iv) Density- (kg/m^3)

= kg/cm^3

= 1/ 100^3

= 1*10^-6 kg/cm^3

v) Youngs Modulus = kg/(m.sec^2)

=kg/(cm*ms^2)

= 1/(100*1000^2)

=1*10^-8 GPa

=1 Pa = 210*1 = 210 Pa

vi) Velocity = KMPH

1hr = 36*10^5 milli second

1km = 10^5 cm

CMPMS = 10^5/(36*10^5)

= 0.02778*56.35

=1.565 CMPMS

vii) Gravity = m/sec^2

= cm/ms^2

= 100/(1000)^2

= 9.81*10^-4 cm/ms^2

Conclusion:

1) Got to know the conversion factor and learned different forms of unit.