A certain comet of mass m = 3 x 1015 kg at its closest approach to the Sun is observed to be at a distance r₁ = 6.0 x 10¹¹ m from the center of the Sun, moving with speed v₁ =28300 m/s.
Orbit in the plane of the page
m
12
At a later time the comet is observed to be at a distance r₂ = 42.9 x 1011 m from the center of the Sun, and the angle between 72 and the velocity vector is measured to be 9.23°. What is v₂?
12 = m/s