BRAINCAKEForces
Revision notes for Forces in AQA Physics (8463). Every lesson in BrainCake comes with R.E.C.I.P.E. recall steps, a quick check and spaced reviews.
- Scalar and vector quantitiesPhysical quantities fall into two types.
- Contact and non-contact forcesA force is a push or a pull that acts on an object because of its interaction with another object.
- GravityWeight is the force acting on an object due to gravity.
- Resultant forcesUsually several forces act on an object at the same time.
- Pressure in a fluidA fluid is a substance that can flow, so it is either a liquid or a gas.
- Atmospheric pressureThe atmosphere is a thin layer of air around the Earth.
- Describing motion along a lineDistance is how far an object moves.
- Forces, accelerations and Newton's Laws of motionNewton's First Law.
- Forces and brakingThe stopping distance of a vehicle is the thinking distance plus the braking distance.
- Momentum is a property of moving objectsEvery object that is moving has momentum.
- Conservation of momentumIn a closed system, no external forces act.
- Changes in momentum (physics only)When a force acts on an object that is moving, or able to move, a change in momentum occurs.