APFIVE Net Force From Internal Forces
A student designs a device in which a magnet is intended to lift itself using its own magnetic field. Which of the following best explains why this device will not work?
A
The magnetic field isn’t strong enough
B
The magnet’s poles will eventually align incorrectly
C
Friction will eventually stop the motion
D
An object cannot exert a net force on itself
Question Leaderboard
| Rank | |||||
|---|---|---|---|---|---|
| #1 | akoch725 | 4 | 4 | 0m 34s | 366 |
| #2 | alallamjumana | 2 | 2 | 0m 00s | 200 |
| #3 | basel.coder | 2 | 2 | 0m 20s | 180 |
| #4 | symphxnymain | 2 | 2 | 0m 36s | 164 |
| #5 | Lantu.Xu27 | 2 | 6 | 0m 00s | 160 |
| #6 | swjrichards | 2 | 2 | 0m 42s | 158 |
| #7 | maymonahassan25 | 1 | 1 | 0m 07s | 93 |
| #8 | m.mohitnair | 1 | 1 | 0m 09s | 91 |
| #9 | nialnm9 | 1 | 1 | 0m 10s | 90 |
| #10 | conniechen0664 | 1 | 1 | 0m 16s | 84 |
Items per page:
10
1 – 10 of 21