Clarification Statement - S.3.PS.2.4.CS:
Examples of problems could include constructing a latch to keep a door shut and creating a device to keep two moving objects from touching each other.

Science and Engineering Practices - 3-5.SEP1.2:
Define a simple problem that can be solved through the development of a new or improved object or tool.

Disciplinary Core Ideas - S.3.PS.2.4.DCI:
PS2.B: Types of Interactions •Electric and magnetic forces between a pair of objects do not require that the object s be in contact. The sizes of the forces in each situation depend on the properties of the objects and their distances apart and, for forces between two magnets, on their orientation relative to each other.