A fly wheel rotates at a constant speed of 3000rpm. The angle described by the shaft in radian in one second is:

Explanation

To solve this question, we first convert the rotational speed of 3000rpm to angular velocity in radians per second, which is 100π radians per second. Then, using the formula θ = ω × time, we find that the angle described by the shaft in one second is 100π radians. Therefore, option C is the correct answer.f = 300 r.p.m. = 300/60 r.p.s;θ = ω.t = 2π × 3000/60 × 1 = 100π radOptions A, B, and D are incorrect because they do not accurately represent the angle described by the shaft in one second, which is 100π radians.