resultant forces

• What is a vector?

  A quantity that has both magnitude (size) and direction
• What is a scalar?

  A quantity that has magnitude but not a direction
• Give an example of a scalar quantity.

  Mass
• What is a resultant force?

  The total force that results from two or more forces acting upon a single object
• What is the purpose of a free body diagram?

  • To visualize all the forces acting on an object
  • To analyze the resultant forces
  • To determine the effects of forces in different directions
• Why do some forces cancel each other out?

  Because they are acting in different directions
• An example of a vector is velocity
• If the resultant of the forces on an object is zero, the forced are balanced.
• If there is a non-zero resultant force on an object, the forces are unbalanced.
• An equalibrium is a state of balance between the forces acting on an object.