7
QuizMultiple Choice

Centripetal Acceleration — Quiz

Question 7 • Physics

The tip of a pinwheel is 0 point 2 4 m from the center. The pinwheel spins 5 times each second. What is the tangential speed of the tip of the pinwheel?

Answer
A
1 point 5 m/s
B
7 point 5 m/s
C
1 point 2 m/s
D
0 point 3 0 m/s

Explanation

Tangential speed is the distance traveled in one revolution multiplied by the number of revolutions per second. The tip travels one circumference, 2πr = 2π(0.24 m), per revolution, so its speed is 2π(0.24 m)(5/s) ≈ 7.5 m/s. Therefore, the correct choice is 7.5 m/s.

AI-written and checked against the verified answer.

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