Why do satellites and spacecraft launched from Earth need to reach a specific speed to escape Earth's surface?
to overcome Earth's gravitational force to protect equipment from radiation to break through the sound barrier to avoid Earth's magnetic field
Question: Why do satellites and spacecraft launched from Earth need to reach a specific speed to escape Earth's surface?
A. to overcome Earth's gravitational force
B. to protect equipment from radiation
C. to break through the sound barrier
D. to avoid Earth's magnetic field
Answer: