Physics- Wednesday, February 11, 2009

In physics today, we extended what we had done in previous classes to dynamics. We first started by reviewing Newton’s 1st and 2nd laws:

  1. An object at rest or in uniform motion will continue in the same state unless acted upon by an external force.
  2. F=ma

In both these cases, the force that is being referred to is the net force. The net force is the resultant force, or the sum of all forces acting on an object (expressed as a single vector). The net force can be solved for by resolving all the forces that may be acting on a mass, finding their sum and combining them using Pythagorean’s theorem to solve for the magnitude of Fnet.

We did an example in class and will be revisiting this idea tomorrow.

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