A force on a body is a push or pull acting on the body from some external body (Unit: N)
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Newton's 3rd law
Every force has an equal and opposite reaction
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F=ma
The mass of a body x its acceleration is equal to the vector sum of the forces acting on the body (resultant force)
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Momentum
The momentum of an object is its mass multiplied by its velocity. It's a vector (Unit: kgms^-1 or Ns)
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Newton's 2nd law
The rate of change of momentum of an object is proportional to the resultant force acting on it, and takes place in the direction of that force.
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The principle of conservation of momentum
The vector sum of the momenta of bodies in a system stays constant even if forces act between the bodies, provided there is no external resultant force
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Elastic collision
A collision in which there is no change in total kinetic energy
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Inelastic collision
A collision in which kinetic energy is lost
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Other cards in this set
Card 2
Front
Every force has an equal and opposite reaction
Back
Newton's 3rd law
Card 3
Front
The mass of a body x its acceleration is equal to the vector sum of the forces acting on the body (resultant force)
Back
Card 4
Front
The momentum of an object is its mass multiplied by its velocity. It's a vector (Unit: kgms^-1 or Ns)
Back
Card 5
Front
The rate of change of momentum of an object is proportional to the resultant force acting on it, and takes place in the direction of that force.
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