By the end of this unit, a successful student will be able to:
1) Distinguish between mass, a scalar quantity independent of location, and forces such as weight, a vector quantity with location dependence (4-3, 4-6)
2) Explain the relationship between mass and inertia. (4-1 à 4-3)
3) Recognize that objects and systems have properties of inertial mass and gravitational mass that are experimentally verified to be the same and that satisfy conservation principles, particularly:
o Inertial mass is the property of an object or a system that determines how its motion changes when it interacts with other objects or systems (APPhys 1.C.1) (4-3, 4-4)
4) Interpret and apply Newton’s first Law of Motion (4-2)
5) Understand that all forces share certain common characteristics when considered by observers in inertial reference frames including:
o Forces are described by vectors (APPhys 3.A.2) (4-1)
o A force exerted on an object is always due to the interaction of that object with another object (APPhys 3.A.3) (4-5)
o Interpret and apply Newton’s third law of motion: If one object exerts a force on a second object, the second object always exerts a force of equal magnitude on the first object in the opposite direction. (AP Phys 3.A.4) (4-5)
6) Understand that classically, the acceleration of an object interacting with other objects can be predicted by using a = (Fnet / m) such that:
o If an object of interest interacts with several other objects, the net force is the vector sum of the individual forces. (APPhys 3.B.1) (4-4)
o Free-body diagrams are useful tools for visualizing forces being exerted on a single object and writing the equations that represent a physical situation. (APPhys 3.B.2) (4-7)
7) Identify appropriate SI units of measurement for force and mass and explain how they are measured. (4-4)
8) Interpret and apply Newton’s second law of motion to show how an object’s motion will change only when a net force is applied. (4-4, 4-7)
9) Use a free body force diagram with forces in one and two dimensions to show forces acting on an object and determine the net force on it. (4-7)
10) Solve motion problems in one and two dimensions using kinematics and Newton’s second law of motion. (4-4 à 4-9)
11) Understand that at the macroscopic level, forces can be categorized as either long-range (action-at-a-distance) forces or contact forces including:
o Gravitational force describes the interaction of one object that has mass with another object that has mass. (APPhys 3.C.1) (4-6)
o Electric force results from the interaction of one object that has an electric charge with another object that has an electric charge (APPhys 3.C.2)
o Contact forces result from the interaction of one object touching another object, and they arise from interatomic electrical forces. These forces include tension, friction, normal, and spring. (APPhys 3.C.4) (4-6, 4-8)
12) Qualitatively distinguish between static and kinetic friction, what the depend on and their effects on the motion of objects (4-8)
13) Understand that certain types of forces are considered fundamental:
o Gravitational forces are exerted at all scales and dominate the largest distance and mass scales (APPhys 3.G.1)
14) Identify the following forces and recognize conditions under which they apply: gravity, static electricity, magnetism, electromagnetism, strong & weak nuclear forces, normal force, friction, drag, tension. (4-4 --> 4-8)
15) (NGSS HS-PS2-1) Analyze data to support the claim that Newton’s second law of motion describes the mathematical relationship among the net force on a macroscopic object, its mass, and its acceleration. (4-4 --> 4-9)
All assignments are due on the date listed. That is not the date they are assigned.
Due date Day Assignment
? Day 1 Read: Chapter 4
Do: Questions: 1-21 (odd) (PS 15)
? Day 3 Do: 4, 6, 7, 8, 12, 15, 17, 37, 44, 47 (PS 16)
? Day 4 Do: 16, 19, 29, 34, 69 (PS 17)
? Day 7 Do: 23, 24, 26, 27, 50, 52, 57, 63 (PS 18)
? Day 8 Write: Compound Bodies Lab
? Day 9 Test 4