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Forces and Motion

Momentum - Calculations.

Calculations using the Equations of Momentum.

Q1.  If an object with a mass of 26kg moves with
a velocity of 5 m/s, what is its momentum?

A1.  momentum = mass x velocity      
     = 26 x 5
             = 130 kgm/s.

The two calculations below show how
doubling the mass or the velocity changes the momentum.

What happens to the momentum if we double the
mass of an object?

Q2.  An object with twice the mass of 52kg moves
with the same velocity at 5 m/s, what is its momentum?

A2.  momentum = mass x velocity     
      = 52 x 5
              = 260 kgm/s.

If we double the mass of an object we double its momentum.

What happens to the momentum if we double the
velocity of an object?

Q3.  An object with the same mass of 26kg moves
with twice the velocity at 10 m/s, what is its momentum?

A3.  momentum = mass x velocity     
         = 26 x 10
               = 260 kgm/s.

If we double the velocity of an object we double its momentum.

We say that momentum
is directly proportional to both mass and velocity.

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