U=−2r2K⇒F=−drdU=2r32K=r3K⇒rmv2=r3K⇒v2=mr2K
⇒21mv2=2r2K⇒E=2r2K−2r2K=0.
A particle is moving in a circular path of radius a under the action of an attractive potential U=−2r2k. Its total energy is:
Held on 8 Apr 2018 · Verified 6 Jul 2026.
−23a2k
–4a2k
2a2k
Zero
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