Most geologists believe that the dinosaurs became extinct 65 million years ago when a la...

Most geologists believe that the dinosaurs became extinct 65 million years ago when a large comet or asteroid struck the earth, throwing up so much dust that the sun was blocked out for a period of many months. Suppose an asteroid with a diameter of 2.0 km and a mass of hits the earth with an impact speed of .

a. What is the earth’s recoil speed after such a collision? (Use a reference frame in which the earth was initially at rest.)

b. What percentage is this of the earth’s speed around the sun? (Use the astronomical data inside the back cover.)