The shuttle orbits about 220 miles above the surface of the Earth. The Earth's radius is about 4000 miles. Given that the force of gravity between two objects (here, the Earth and the shuttle) is given by
force = G m_earthm_shuttle / d_{Earthcenter-to-shuttle}²
The force of gravity on the shuttle in orbit is
    A ) much greater than the force of gravity on the surface of the Earth
    B) much less than the force of gravity on the surface of the Earth
    C) about the same as the force of gravity on the surface of the Earth
    D) can't tell from information given

When called for, hold up the letter of your choice.