Download Newton`s Laws Review

Newton’s Laws Review
1. The acceleration of an inertial reference frame is ___________(zero, non-zero,
constant), meaning, it either moves with a ____________________ (constant
acceleration, constant velocity) or it is at rest.
2. Draw a free-body-diagram for a person standing on the ground. The forces involved
are the normal force and the person’s weight.
3. Is the normal force and the weight of the person described in #2 above an action/
reaction pair of forces?
4. Is a constant accelerating elevator a good inertial reference frame?
5. True or False? The concepts of Dark Matter and black holes were introduced by the
scientific community in order to save Newtonian Physics from being invalidated.
6. True or False? Due to the seemingly non-Newtonian behavior of Uranus, scientists
introduced the planet Neptune to save Newtonian Physics from being invalidated.
7. State Newton’s Second Law.
8. The following graphs shows how the net force on an object with constant mass varies
with time. Sketch the corresponding acceleration versus time graph and the
acceleration versus net force graph for the object.
9. State Newton’s Third Law.
10. The Earth exerts a gravitational force downward on an object. This gravitational
force is called the object’s weight. If this is the action force, what is the reaction force?
11. A person is holding a ball in her hand and accelerating the ball upward.
a. If the action force is the force she exerts upward on the ball, what is the reaction
force?
b. Is the action force greater than, less than, or equal to the weight of the ball?
12. The moon exerts a gravitational force on the Earth. This force causes ocean tides.
a. If this is the action force, what is the reaction force?
b. Is the force on the Earth due to the moon greater than, less than, or equal to the
force on the moon due to the Earth?
13. Sketch each of the following graphs to show the relationship between net force,
mass, and acceleration.