Spot the one that does not fit

Exercise and reference answers

Questions

1. Items

   1. Sliding friction
   2. Spring force
   3. Zero in a cycle
   4. End points only

   Odd item

   Sliding friction

2. Items

   1. Purely potential
   2. At the top
   3. At the ground
   4. Held at height

   Odd item

   At the ground

3. Items

   1. Massless spring
   2. Smooth surface
   3. Rigid wall
   4. Rough floor

   Odd item

   Rough floor

4. Items

   1. Scalar
   2. From motion
   3. Mass and speed
   4. Has direction

   Odd item

   Has direction

Instructions

Tap the item that does not belong with the rest.

Explanation