7. A leaf falls from a tree. What force(s) are acting on it?
A. Air resistance only
B. Gravitational force only
C. Applied force and air resistance
D. Air resistance and gravitational forces
8. When a cabinet touches the floor, which type of forces exist?
A. Contact forces
B. Balanced forces
C. Non-contact forces
D. Unbalanced forces
9. The Earth has a bigger mass than the Moon. If you were able to travel to the Moon, what happens to your weight?
A increases
B. decreases
C. stays the same
D. varies with day and night
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