The automobile beltway around many cities is approximately circular. Suppose that you start driving at point A on the east side
of the beltway and drive counterclockwise at an unchanging 90 km/hr (Figure 3.13). As you pass point B on the north side, what is your speed? Your velocity?
2 answers:
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Answer:
c.
Explanation:
= Initial distance between asteroid and rock = 7514 km = 7514000 m
= Final distance between asteroid and rock = 2823 km = 2823000 m
= Initial speed of rock = 136 ms⁻¹
= Final speed of rock = 392 ms⁻¹
= mass of the rock
= mass of the asteroid
Using conservation of energy
Initial Kinetic energy of rock + Initial gravitational potential energy = Final Kinetic energy of rock + Final gravitational potential energy