Friction and drag bingo

Exercise and reference answers

Clues and terms

1. Clue

   Force opposing relative motion of surfaces that touch

   Item

   Friction

2. Clue

   Friction acting while the surfaces are not yet sliding

   Item

   Static

3. Clue

   Friction acting once the surfaces are sliding on each other

   Item

   Kinetic

4. Clue

   Contact force acting at right angles to the surface

   Item

   Normal force

5. Clue

   Number set by the pair of materials in contact

   Item

   Coefficient

6. Clue

   Resistance of a fluid, growing as the speed squared

   Item

   Drag

7. Clue

   Steady falling speed reached when drag has met weight

   Item

   Terminal vel

8. Clue

   Change in length produced when a force is applied

   Item

   Deformation

9. Clue

   Quantity the atomic drag on a probe tip relates to

   Item

   Shear stress

Instructions

Read each call, tap its term on the board. Three in a line is bingo.

Explanation