A car with a mass of 1750 kilograms, traveling at a speed of 15 meters/second, crashes into a wall and stops. What is the kinetic energy after this perfectly inelastic collision? a
2.0 × 105 joules

b
1.0 × 104 joules

c
2.6 × 104 joules

d
0.0 joules

The sun’s mass is 2.0×10^ 30 kg, its radius is 7.0×10 5 km, and it has a rotational period of approximately 28 days. if the sun should collapse into a white dwarf of radius 3.5×10 3 km, what would its period be if no mass were ejected and a sphere of uniform density can model the sun both before and after?