Mechanics common mistakes

Common mistakes

• Resultant forces and dynamics common mistake 1

  Writing a final answer without showing the method that justifies it. This can weaken answers for: R5 Understand and use addition of forces, resultant forces and dynamics for motion in a plane..

  Fix itShow the method first, then give the final answer in the required form. Apply this directly to Resultant forces and dynamics.

• Friction common mistake 1

  Writing a final answer without showing the method that justifies it. This can weaken answers for: R6 Understand and use the F <= mu R model for friction, coefficient of friction, motion of a body on a rough surface, limiting friction and statics..

  Fix itShow the method first, then give the final answer in the required form. Apply this directly to Friction.

• Moments common mistake 1

  Writing a final answer without showing the method that justifies it. This can weaken answers for: S1 Understand and use moments in simple static contexts..

  Fix itShow the method first, then give the final answer in the required form. Apply this directly to Moments.