Ch4_AronsonJ

=Physics Classroom=

toc
 * Lesson 1**
 * 1) What are the regular and layman’s definitions of the Law of Inertia?
 * 2) An object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force.
 * 3) Objects want to keep on doing what they’re already doing.
 * 4) Inertia=resistance of an object to change state of motion
 * 5) What makes forces “balanced”?
 * 6) Object at rest
 * 7) v=0m/s
 * 8) a=0 m/s^2
 * 9) Stays at rest
 * 10) Object in constant motion
 * 11) v ≠ 0 m/s
 * 12) a=0 m/s2
 * 13) Stays in motion (same speed and direction)
 * 14) What makes forces “unbalanced”?
 * 15) An object is unbalanced when there are two forces of different magnitudes that are not in opposite directions.
 * 16) Ex. Sliding a book across a table with friction
 * 17) Is a force required to keep an object in motion?
 * 18) No, but an object is required to slow down an object.
 * 19) How are mass and inertia related?
 * 20) The more mass an object has, the more inertia it has, and vice versa.
 * 21) How does inertia relate to velocity and acceleration?
 * 22) Inertia=tendency of an object to resist changes in velocity/acceleration


 * Lesson 2 **
 * 1) Are there different categories of forces? Into which of those categories would the forces that we have learned be placed?
 * 2) Contact forces=forces from interaction between two objects that physically contact each other
 * ** Force ** || ** Symbol ** || ** Description ** ||
 * Normal || N, FN || Push due to contact between two surfaces || Perpendicular to surfaces and through system ||
 * Tension || T, FT || Pull due to rope or chain || Along rope and away from system ||
 * Friction || f, Ff || Rubbing between two surfaces || Parallel to surfaces and away from system ||
 * Air resistance || Fair ||||  ||
 * Spring || Fspring ||||  ||
 * 1) Action-at-a-distance forces=forces from interaction between two objects that do not physically contact each other, but are able to exert push or pull
 * **Force** || ** Symbol ** || ** Description ** ||
 * Weight || W, Fg || Pull of Earth on mass (=m  g) || Straight down ê ||
 * Electrical ||||||  ||
 * Magnetic ||||||  ||
 * 1) In what unit is force measured?Newtons [1 N=(1kg)(m/s2)]
 * 2) What is the difference between mass and weight?
 * 3) The mass of an object refers to the amount of matter within the object, while the weight of an object is the force of gravity acting upon it.
 * 4) Inertia affected by mass ONLY
 * Lesson 3-a.,b.**
 * 1) What is Newton’s Second Law of Motion?
 * 2) Unbalanced forces cause objects to accelerate with an acceleration that is directly proportional to the net force and inversely proportional to the mass.
 * 3) Acceleration is in the same direction as net force.
 * 4) Are there equations that represent this law?
 * 5) a=Fnet/m
 * 6) Acceleration produced by net force
 * 7) m=mass (not meters here)
 * 8) Fnet=(m)(a)
 * 9) In what unit is force represented?
 * 10) (kg)(  m/s2)
 * 11) Does an object with balanced forces have acceleration? What about an object with unbalanced forces?
 * 12) No, when an object’s forces are balanced, a=0.
 * 13) At rest stays at rest
 * 14) Yes, when an object’s forces are unbalanced, there is acceleration.
 * 15) Acceleration depends on:
 * 16) Net force
 * 17) Object’s mass
 * 18) What is the most common misconception surrounding Newton’s laws?
 * 19) The primary misconception is that a continued force is required to keep an object in motion. We know from Galileo’s experiment that that is false.
 * 20) How are vectors related to Newton's Second Law?
 * 21) Net force is equal to the sum of all individual vectors.
 * Lesson 4**
 * 1) What is Newton's Third Law?
 * 2) For every action, there is an opposite reaction that is equal in force and opposite in direction.
 * 3) For example, if a truck crashes into a car, is the force of the car on the truck equal to the force of the truck on the car?
 * 4) Yes, because the Third Law states that the force is the same on both systems. If the damage is greater to the car, it indicates that the truck simply had more mass, but not more force.
 * 5) How is mass related to the Third Law?
 * 6) If two systems interact, the forces are the same, but the one with greater mass will impact the one with lesser mass in a more tangible way. (See above.)