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Adding Momentum

Since linear momentum must be conserved and momentum is a vector quantity, the vector sum of the initial momentum must be equal to the vector sum of the total final momentum.In the following diagram a ball A collides with a stationary ball B. Both balls move in different directions.Momentum must be conserved so total initial momentum p = total final momentum p1 + p2 = pThe vector triangle illustrates that p = p1 + p2

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Specification: OCR Physics A (H156), AS-level, 3.5.1 Newton's laws of motion. Topic: Momentum.

Key terms in this lesson

potential difference
The work done, or energy transferred, per unit charge as charge moves between two points in a circuit.
resistance
The ratio of the potential difference across a component to the current through it.

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