Physics Unit 4 - Momentum

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Is momentum a scalar or a vector quantity?
Vector
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If you want to stop an object from moving, what must be removed?
The objects momentum
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How can you investigate the rate of change of momentum?
Record the movement of a trolley over time as a force makes it move from rest. Plot a graph of Momentum-Time, the gradient will equal the force (rate of change of momentum)
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What is the conservation of momentum dependent on?
That no external forces act
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How is momentum conserved in an explosion?
The momentum before = 0. Therefore the momentum after must be zero. Thing move in opposite directions and different speeds, these will cancel out to give 0 momentum.
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How is the conservation of momentum responsible for Newton's third law?
A force changing the momentum in one direction must be countered by an equal and opposite force to ensure that the overall momentum is conserved
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What type of collision is kinetic energy conserved?
Elastic collision
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What is an example of an elastic collision?
Alpha particles being scattered by a nucleus
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On a velocity time graph, how could you see a change in direction?
There would be negative velocity
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Other cards in this set

Card 2

Front

If you want to stop an object from moving, what must be removed?

Back

The objects momentum

Card 3

Front

How can you investigate the rate of change of momentum?

Card 4

Front

What is the conservation of momentum dependent on?

Card 5

Front

How is momentum conserved in an explosion?

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