Final answer:
The statement that a 45rpm record spins at 45 rotations per minute on both side A and B is true. The speed of rotation for any record is the same on both sides.
Step-by-step explanation:
The question refers to whether a 45rpm (revolutions per minute) record actually turns at 45 rotations per minute on each side. The statement is true. A 45rpm record is designed to spin on the turntable at a speed of 45 rotations per minute whether it's playing side A or side B.
For example, if a phonograph turntable is rotating at 33 1/3 rev/min and slows down and stops in 1.0 min, the angular acceleration and the number of revolutions made by the turntable while stopping can be calculated using physics equations of motion for constant angular acceleration.
Similarly, if various objects are spinning at the same angular velocity, the one with the largest radius, such as a vinyl record, would have the highest speed at the edge because tangential speed is directly proportional to the radius.