Question Detail
Question
A 15 g stopper moves in a conical circle of radius 0.80 m at speed 8.9 m/s. Time taken to make 30 revolutions?
Correct Answer
Option E is the correct answer.
Detailed Explanation
Period T = 2πr/v = 2π(0.80)/8.9 ≈ 0.565 s. Time for 30 revolutions ≈ 16.9 s.
Hint
Find period of one revolution first.