Q. A cardinal (Richmondena cardinalis) of mass 3.60×10-2 kg and a baseball of mass 0.140 kg have the same kinetic energy. What is the ratio of the cardinal's magnitude p_c of momentum to the magnitude p_b of the baseball's momentum?
Q. what is the weight of a 225kg space probe on the moon? the acceleration of gravity on the moon is 1.62m/s.