9. Work & Energy
Intro to Energy & Kinetic Energy
Multiple Choice
Multiple ChoiceAbout 50,000 years ago, a meteor crashed into the earth near present-day Flagstaff, Arizona. Some estimates suggest this meteor had a mass of about 1.4×108 kg and released 1×1016 J of energy when it slammed into the Earth. Calculate the approximate speed of this meteor before impact.
A
8,450 m/s
B
12,000 m/s
C
1.43×108 m/s
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