Susan wants to observe what will happen when two rocks with different masses are pushed down a slide. Susan puts the two rocks at the top of the slide and pushes each
rock with an equal force. Below the slide, Susan’s friend Nancy stands to catch the
sliding rocks. Based on Newton’s law of inertia, which of the following is true?
F The rocks require no force from Nancy to stop moving.
G The rock with the smaller mass requires a greater force from Nancy to stop it from
moving.
H Both rocks require the same amount of force from Nancy to stop them from
moving.
J The rock with the larger mass requires a greater force from Nancy to stop it from
moving.