A) 3N
B) 15.1 N
C) 31.5 N
D) 35.1 N
Correct Answer: D
Solution :
When body performs circular motion, it is acted upon by a centripetal force the magnitude of which is given by\[F=\frac{m{{v}^{2}}}{r}\] where, m is mass v the velocity and r the radius. Since, \[v=r\omega \] \[\therefore \] \[F=mr{{\omega }^{2}}\] Given, \[m=0.12kg,\text{ }r=0.5m,\] \[\omega =231\,rpm=\frac{2\pi \times 231}{60}rad/s=24.2\,rad/s\] \[\therefore \] \[F=0.12\times 0.5\times {{(24.2)}^{2}}=35.1N\]You need to login to perform this action.
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