AS101 Lecture Notes - Contact Force, Net Force, International System Of Units
Document Summary
Motion: where is something and when is it there, position is measured relative to a coordinate system. Speed: rate at which an object moves, velocity: speed and direction, use si units (m/s) unless otherwise asked. Acceleration: the rate of change of velocity with time change of velocity/time, since velocity has a direction, acceleration also has a direction. The acceleration of gravity: all falling objects have constant acceleration downwards (not counting friction of air resistance, on earth acceleration of gravity, g=10 m/s2. Speed increases 10m/s with each second of falling. Momentum: mass x velocity, since velocity has direction, momentum has direction, newton discovered a relationship between force and momentum. A contact force (the agent touches the object) A long range force (the agent does not actually touch the. Newton"s three laws of motion: object: an object remains at rest or at constant velocity unless a net force acts to change its speed or direction.
