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Created page with "==Key Stage 4 Higher== ===Meaning=== An '''impact force''' is the force involved in the collision between two objects. ===About Impact Forces=== : '''Impact forces'''..."
==Key Stage 4 Higher==
===Meaning===
An '''impact force''' is the [[force]] involved in the collision between two [[object]]s.
===About Impact Forces===
: '''Impact forces''' are proportional to the change in [[momentum]] during a [[collision]] and inversely proportional to the [[time]] taken for the [[collision]].
: '''Impact forces''' explain the reason crashing at high [[speed]] is so dangerous and why cars have crumple zones and air bags. They both increase the time taken for the passengers to change [[momentum]] which reduces the [[force]] experienced by them.
===Equation===
''NB: You do not need to remember the equation but you do need to be able to use it.
Combining the two equations:
<math>a=\frac{F}{m}</math>
and
<math>a = \frac{\delta v}{t}<\math>
Gives
<math>\frac{F}{m} = \frac{\delta v}{t}<\math>
<math>F = \frac{m \delta v}{t}<\math>
Where:
<math>F <\math> = The impact [[force]].
<math>m \delta v</math> = The change in [[momentum]].
<math>t<\math> = The time taken for the [[momentum]] to change.
===Meaning===
An '''impact force''' is the [[force]] involved in the collision between two [[object]]s.
===About Impact Forces===
: '''Impact forces''' are proportional to the change in [[momentum]] during a [[collision]] and inversely proportional to the [[time]] taken for the [[collision]].
: '''Impact forces''' explain the reason crashing at high [[speed]] is so dangerous and why cars have crumple zones and air bags. They both increase the time taken for the passengers to change [[momentum]] which reduces the [[force]] experienced by them.
===Equation===
''NB: You do not need to remember the equation but you do need to be able to use it.
Combining the two equations:
<math>a=\frac{F}{m}</math>
and
<math>a = \frac{\delta v}{t}<\math>
Gives
<math>\frac{F}{m} = \frac{\delta v}{t}<\math>
<math>F = \frac{m \delta v}{t}<\math>
Where:
<math>F <\math> = The impact [[force]].
<math>m \delta v</math> = The change in [[momentum]].
<math>t<\math> = The time taken for the [[momentum]] to change.