OCR AS Physics - Unit 1 Mechanics forces summary

OCR AS Physics - Unit 1 Mechanics forces summary

1. Density

   • Mass per unit volume

2. Pressure

   • liquids
   • Force per unit area

3. Car Safety

   • Seat belts, air bags, crumple zones
   • Kinetic energy = Braking force X Braking distance
   • Stopping distance = Thinking distance + Braking distance
     • Factors.....
   • Satellite Navigation

4. Turning Forces

   • Moment
     • Moment = F X Perpendicular distance from the pivot
       • Principle of moments
   • Couple
   • Torque
     • Torque = One of forces X Perpendicular distance between the forces

5. Resulatant Forces

   • Balanced forces
     • Terminal velocity
       • Drag
   • Newton definition
   • F = ma
   • Forces: thrust, lift, friction, weight, air, resistance etc....
     • w = mg
   • Accelerations

6. Centre of gravity

   • Experimental method

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