Force and momentum: Motion and force: Physics: GCSE (9:1)

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Last updated 9:58 AM on 8/3/26
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12 Terms

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Change in momentum

When a force acts on an object that is moving, or able to moveΔ

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F = mΔv / t

The equation linking force, change in momentum and time

<p>The equation linking force, change in momentum and time</p>
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F

The symbol for force

<p>The symbol for force</p>
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mΔv

The symbol for change in momentum

<p>The symbol for change in momentum</p>
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t

The symbol for time

<p>The symbol for time</p>
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Newtons (N)

The SI unit for force

<p>The SI unit for force</p>
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Kilogram metres per second (kg m/s)

The SI unit for change in momentum

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Seconds (s)

The SI unit for time

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Force defined in terms of momentum

Force equals the rate of change of momentum

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Force involved in collisions

The force of a collision is equal to the rate of change of momentum in bringing the vehicle to a stop

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Car safety features that reduce the force of a collision

Seatbelts, airbags, crumple zones

<p>Seatbelts, airbags, crumple zones</p>
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How car safety features reduce the force of a collision

They increase the time taken for a collision to occur, which reduces the force for the same change in momentum