Key Idea.
Section 1
Detecting Invisible Forces
How can someone know a force is there if it is invisible and nothing is touching the object?
The secret is to use the evidence of a change in motion. For example, if a magnet causes a paperclip to slide across the table without touching it, that movement is a clue.
Book overview
Jump across lessons in the current chapter without opening the full course modal.
Continue this chapter
Expand to review the lesson summary and core properties.
Section 1
Detecting Invisible Forces
How can someone know a force is there if it is invisible and nothing is touching the object?
The secret is to use the evidence of a change in motion. For example, if a magnet causes a paperclip to slide across the table without touching it, that movement is a clue.
Book overview
Jump across lessons in the current chapter without opening the full course modal.
Continue this chapter