A $2$ kg mass is whirled in a horizontal circle of radius $0.5$ m with an angular velocity of $4$ rad s$^{-1}$. Find the centripetal force.
A$4$ N
B$8$ N
C$32$ N
D$16$ NCORRECT
JUPEBPhysicsCircular and Simple Harmonic Motion
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Why the answer is D, and why the others tempt you.
$F = m\omega^2 r = 2 \times 16 \times 0.5 = 16$ N. Using $\omega$ instead of $\omega^2$ gives 4 N.
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