Earth rotates eastward with linear speed 0.46km s−1 at the equator. Ignoring air resistance, what minimum launch speed relative to Earth’s surface must a rocket provide to escape when launched vertically from the equator? (Escape speed from the surface is 11.2km s−1.)
a) 10.7km s−1
b) 11.7km s−1
c) 11.2km s−1
d) 11.0km s−1