Question

As an object falls toward Earth

a. The object does not exert a force on Earth
b. The object exerts a downward force on Earth
c. Newton's 3rd law doesn't apply
d. The upward acceleration of Earth is negligible because of it's large mass

Answer 1

Two masses always exert a gravitational force on each other, even if it is negligible. this is a rough sketch direction of the gravitational forces acting one each object. Note their directions.

Answer 2

from thrid law of newton d is correct

Answer 3

i am not agree with hosien .the newton third law must be applicable