The Crab Pulsar Is a Neutron Star, Rotating with a Period

Multiple Choice

The Crab Pulsar is a neutron star, rotating with a period of about 33.085 ms. It is estimated to have an equatorial radius of 15 km, about average for a neutron star. The pulsar is slowing in its rotation so that it is expected to come to rest 9.5 × 10¹⁰ s in the future. What is the magnitude of the average angular acceleration in this situation?

A) 4.8 × 10⁻⁶ rad/s²
B) 3.0 × 10⁻⁵ rad/s²
C) 7.6 × 10⁻⁷ rad/s²
D) 2.0 × 10⁻⁹ rad/s²
E) 3.2 × 10⁻¹⁰ rad/s²