Question Detail
Question
A 4 kg ball is swung in a horizontal circle with a radius of 2 m. If the period is 0.5 s, what is its linear speed?
Correct Answer
Option B is the correct answer.
Detailed Explanation
The speed is the circumference divided by the period: v = 2πR / T = (2π * 2 m) / 0.5 s = (4π m) / 0.5 s = 8π m/s.
Hint
The object travels the circumference of the circle (2πR) in one period (T). Use the formula P = 2πR/v.