By the end of this unit, a successful student will be able to:
1) Relate mass, velocity, and linear momentum for a moving object, and calculate total linear momentum for a system of objects (7-1) (MSTE: Phys 2.5; AP Phys ID2a)
2) Understand that interactions with other objects or systems can change the total linear momentum of a system:
o The change in linear momentum for a constant-mass system is the product of the mass of the system and the change in velocity of the center of mass. (APPhys 4.B.1) (7-8, 7-10)
o The change in linear momentum of the system is given by the product of the average force on that system and the time interval during which the force is exerted. (APPhys 4.B.2) (7-3)
3) Understand that a force exerted on an object can change the momentum of the object such that:
o The change in momentum of an object is a vector in the direction of the net force exerted on the object (APPhys 3.D.1) (7-1)
o The change in momentum of an object occurs over a time interval (APPhys 3.D.2) (7-1)
4) Calculate the impulse of an object (7-3)
5) Relate change in linear momentum, to impulse (7-3) (AP Phys ID2b)
6) Interpret and apply Newton’s 2nd Law of motion in terms of momentum. (7-1) (AP Phys ID2b)
7) Calculate the area under a force versus time graph and related it to the change in momentum of an object (AP Phys ID2d)
8) Identify appropriate standard international units of measurement for momentum (7-1) (MSTE: Phys 2.6)
9) Use mathematical representations to support the claim that the total momentum of a system of objects is conserved when there is no net force on the system (NGSS HS-PS2-2) (7-2)
10) Interpret the law of conservation of momentum and provide examples that illustrate it. (7-2) (MSTE: Phys 2.5)
11) Identify situations in which linear momentum or a component of the linear momentum vector, is conserved (AP Phys ID3a2) (7-2, 7-7)
12) Solve problems involving momentum conservation in one and two dimensions (7-2, 7-3 à7-7) (AP Phys ID3a3)
13) Distinguish between elastic and inelastic collisions (7-4, 7-5, 7-6)
14) Solve elastic and inelastic collision problems in one and two dimensions. (7-4, 7-5, 7-6, 7-7) (AP Phys ID3a3, AP Phys ID3a4)
15) Analyze situations in which two or more objects are pushed apart by a spring or other agency, and calculate how much energy is released in such a process. (AP Phys ID3a5)
All assignments are due on the date listed. That is not the date they are assigned.
Due date Day Assignment
? Day 1 Read: 7-1à 7-3; 7-6 (Impulse and Momentum, Open Systems)
Do: Questions: 1-9 (PS 24) (Goals 1 – 8)
? Day 3 Do: pp. 193-195 2, 3, 5, 6, 12, 15, 16, 18, 19, 21, 31, 35 (PS 25)
(Goals 1 – 8)
Read: 7-4, 7-5; 7-7à7-10
? Day 4 Do: Questions: 10-19 (PS 26) (Conservation of Momentum, Closed
Systems) (Goals 9 – 15)
? Day 7 Do: Lab: 19 Momentum, Energy and Collisions (Goals 9 – 15)
? Day 8 Do: 24, 27, 41, 42, 47, 58, 63, 77, 81 (PS 27) (Goals 9 – 15)
? Day 9 Test: Chapter 7: Linear Momentum
The Mechanical Universe 15: Conservation of Momentum (Calculus based)