Collisions of commercial aircraft with birds are a serious safety hazard, especially when a plane is taking off or landing. Consider a typical goose that collides with an airplane taking off at 70 m/s (about 150 mi/h) and compare the impact with that of a 500-kg mass (about half the size of a small car) dropped from a height of 3 m. Which impact—the goose hitting the plane or the mass hitting the ground—will likely do more damage? Or will it be about the same? Compare the kinetic energy of the mass just before it hits the ground with the kinetic energy of a goose moving at 70 m/s.