Speed of Earth when a rock of mass 60 kg falling towards Earth with speed of 20 m s-1 is {{}}
A) 2.4 × 10-22 m s-1
B) 3.5 × 10-33 m s-1
C) −2.0 × 10-22 m s-1
D) −3 × 1034 m s-1
Correct Answer:
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