unit of force?

Question

United in si

Answer 1

You know that the equation for force is mass times acceleration.  The unit for mass is kg.  The unit for acceleration is m/s².

 

Let m = mass

Let a = acceleration

 

F = ma

F = kg * m/s²

 

The unit of force is a derived unit because we multiply two fundamental (basic form) quantities together to obtain a new quantity. 

 

In addition, acceleration is a derived unit within itself because we divide the distance (m) by the time (s), which are both fundamental quantities.  This gets us velocity (m/s).  Then we divide this by time to obtain acceleration ((m/s)/s) = m/s².

Answer 2

In SI (formerly mks) units, the unit of force is the newton = kg*m/sec², named in honor of Sir Isaac Newton.

 

http://en.wikipedia.org/wiki/International_System_of_Units#Derived_units