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What is momentum?
"Momentum" is a very useful term that was devised to
help us to control our environment and to predict how
collisions will turn out.
If you think of something being thrown at a pane of
glass, the outcome will depend on what is being
thrown (its mass) and on how fast it is travelling (its
velocity).
Very simply then: Momentum = mass x velocity
The unit of momentum does not have a name after a
particular scientist, so can be remembered from the
way in which it is calculated. It is : kg m/s…read more

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EXAMPLE
Think of a bowling ball (2kg) moving towards a
stationary penguin (1kg) at a high speed.
Now think of a tennis ball (60g) kicked very gently
towards the same penguin.
The effect the different amounts of momentum
(contained by each object) has on the penguin is
immediately obvious!…read more

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Worked Examples: 1
What is the momentum of a trolley that has a mass of
3kg if its moving at a constant speed of 2.5m/s?
Momentum = mass x velocity = 3 x 2.5= 7.5 kg m/s
Consider a trolley that has a mass of 4kg, moving at a
constant speed of 2m/s towards a second trolley of
identical mass. If this trolley is moving in the same
direction at 1m/s, what is the total momentum of this
system?
Total Momentum = (4 x 2) + (4 x 1) = 8 + 4= 12 kg m/s…read more

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The importance of DIRECTION
Would the outcome of a "head-on" collision
between two cars be different to a collision
involving one car being hit from behind by another
faster car?…read more

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The importance of DIRECTION
Would the outcome of a "head-on" collision
between two cars be different to a collision
involving one car being hit from behind by another
faster car?…read more

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