Question

Certain neutron stars are believed to be rotating at about 1 rev/s. If such a star has a radius of 1.6 km, the acceleration of an object on the equator of the star will be nearly ____________.

Options

• 20 x 10³ m/s²

• 63 x 10³ m/s²

• 120 x 10⁵ rn/s²

• 4 x 10³ rn/s²

Answer 1

Certain neutron stars are believed to be rotating at about 1 rev/s. If such a star has a radius of 1.6 km, the acceleration of an object on the equator of the star will be nearly 63 x 10³ m/s².

Explanation:

Using,

`"a" = omega^2 "r" = 4pi^2  "n"^2 "r"^2`

`= 4 (3.14)^2 xx 1^2 xx 1.6 xx 10^3`

`therefore "a" approx 63 xx 10^3  "m"//"s"^2`