# F = ma

In the presence of a NET FORCE, an object experiences an ACCELERATION

>> directly proportional to the NET FORCE

>> inversely proportional to the MASS of the object.

Remember, though,

>> F is the NET force

>> m is the mass which that net force acts on.

We often turn this around and write it as

What are the UNITS of force in

# F = m a

A force of ONE unit

will give an object of 1.0 kg mass

an acceleration of 1.0 m/s/s ;

this force is known as

ONE NEWTON (1.0 N) .

1 N = ( 1 kg ) ( 1 m/s/s )

# F = m a

>> Force will be measured in newtons

>> A force of 1 N will give

a mass of 1 kg

an accelertion of 1 m/s/s.

1 N = ( 1 kg ) ( 1 m/s/s )

### 12 N = ( 3 kg ) ( 4 m/s/s )

A force of 12 N could give

a mass of 3 kg

an accelertion of 4 m/s/s

### 12 N = ( 2 kg ) ( 6 m/s/s )

A force of 12 N could give

a mass of 2 kg

an accelertion of 6 m/s/s .

If an object is in equilibrium--at rest--then, the net force on the object must be zero.

That is, the sum of all the forces on an object is zero when the object is in equilibrium.