High School

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A wheel with a radius of 15 cm is rotating at 20 rpm. Find the linear speed of the wheel in meters per second. Round to two decimal places.

A) 1.57 m/s
B) 4.71 m/s
C) 9.42 m/s
D) 18.85 m/s

Answer :

Final answer:

The linear speed of the wheel with a 15cm radius rotating at 20rpm is 18.85 m/s. Correct option is d .

Explanation:

To find the linear speed of a wheel with a radius of 15cm rotating at 20rpm, we use the formula:
Linear Speed = 2 x π x radius x RPM

Substitute the values:
Linear Speed = 2 x 3.14 x 0.15m x 20 = 18.85 m/s

Therefore, the linear speed of the wheel is 18.85 m/s.

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