Most geologists believe that the dinosaurs became extinct 65 million years ago when a large comet or
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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 1.0 × 1013 kg hits the earth (6.0 × 1024 kg) with an impact speed of 4.0 × 104 m/s.
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?
The earth orbits the sun at a distance of 1.5 × 1011 m.
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Physics for Scientists and Engineers A Strategic Approach with Modern Physics
ISBN: 978-0133942651
4th edition
Authors: Randall D. Knight
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