[问答题]
When an object falls freely under the influence o1f tyi -xp0;z,a my-rlf gravity therep:gam9fm/flhc* ; swa1 *v,,8xz uca x is a net force mg e8hg lpc ama9,;u *mf:xsc ,azfwvx/1* xerted on it by the Earth. Yet by Newton’s third law the object exerts an equal and opposite force on the Earth. Why doesn’t the Earth move?
