Two Cardboard Boxes Full of Books Are in Contact with Each

Multiple Choice

Two cardboard boxes full of books are in contact with each other on a table, as shown in Figure 4-4. Box H has twice the mass of box G.

If you push on box G with a horizontal force F, then box H will experience a net force of

A) F.
B) 2 F.
C) 3 F.
D) 2/3 F.
E) 3/2 F.