Question

A volunteer is rotated in a horizontal circle of radius 7 m. Find the period of rotation for which the acceleration is equal to 3g

• A. 2.61 s
• B. 2.87 s
• C. 3.07 s
• D. 3.31 s

Answer 1

Answer: (C)

3.07 s

Answer 2

a_r = r$\left( \frac{2\pi}{T} \right)^{2}$ = 3g or 7 $\left( \frac{4\pi^{2}}{T^{2}} \right)$ = 3g or T = 3.07 s.