This physics problem tests your understanding of fundamental physical laws and their applications. The step-by-step solution below breaks down the problem using relevant equations and physical reasoning.
ScanSolve AI Answer
A) Step 1: Identify the given values. The initial angular velocity, since the record starts from rest, is _i = 0 rad s^-1. The final angular velocity is _f = 4 rad s^-1. The time taken is t = 5 s. Step 2: Use the kinematic equation for angular motion. The relationship between initial angular velocity, final angular velocity, angular acceleration (), and time is given by: _f = _i + t Step 3: Substitute the given values into the equation and solve for . 4 rad s^-1 = 0 rad s^-1 + (5 s) 4 = 5 = (4)/(5) = 0.8 rad s^-2 The constant angular acceleration is 0.8 rad s^-2. The final answer is A) 0.8 rad s^-2.