Mars has about 1/10th the mass of the Earth, and about 1/2 the radius of the Earth. If a 100 lb person went to visit, how much would they weigh, remembering that
force = G m_planetm_person / R_planet²

    A ) 10 lbs
    B) 40 lbs
    C) 100 lbs
    D) 400 lbs

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