7. When no forces act on moving objects on air, how can you describe their paths?

A. Circles
b. Ellipses
C. Parabola
D.Straight lines
8.Which of the following best describes an accelerating object?

A. Object at rest
C. Object in mechanical equilibrium
B. Object moving at constant velocity
D. Object moving

9. Which of the following is true about acceleration due to gravity?

A. It is different for different objects in free-fall
C. It is a fundamental property B. It increases in decreasing altitude
D. It is a universal constant

10. Which Newton's law of motion states that the acceleration of an object depends on the mass and amount force applied? A. Law of Inertia
B. Law of Acceleration
C. Law of Interaction
D. Law of Action-reaction

11. A ball placed on top of a table is an example of what law?
A. Law of Inertia
B. Law of Acceleration
C. Law of Interaction
D. Law of Action-reaction

12. Which of the following is described by Isaac Newton as a natural motion?

A. Pushing the wall
B. Pulling a rope

C. A thrown ball to the sky
D. A smoke moves upward the atmosphere

13. According to Galileo, a rolling ball that rolls on a flat plane will
A. disappear
C.stop due to the pull of gravity.

D. continues to roll if the ball is unimpeded

B. stop immediately

14. Why do a coconut and a bird's feather falling from a tree through the air to the ground below gain speed?
A. Their velocity changes
C. There is a gravitational force acts on them
D. Their nature to become closer to the Earth
B. Their inertia

15. Which Newton's law of motion states that an object at rest will remain at rest unless acted upon by force?
A. Law of Inertia B. Law of Acceleration C. Law of Interaction D. Law of Action-reaction​