Physics 112
Homework #2
Fall 2005
Read:
Chapter 1, sections 1.8 - 1.10 (through Example 1.11 on page 27)
Chapter 3, section 3.5
Chapter 2 (all)
For discussion:
Chap. 1: Q's
#Q1.21;
E's & P's
#1.35, 1.43, 1.86 [answer: 109.5°]
(not turned in)
Chap. 2: Q's
#Q2.3, Q2.4, Q2.6, Q2.10, Q2.11, Q2.12, Q2.15, Q2.16, Q2.20
E's & P's
#2.5, 2.19, 2.31, 2.32, 2.39, 2.41, 2.51, 2.53, 2.65, 2.79
Chap. 3: Q's
#Q3.14, Q3.16;
E's & P's
#3.37, 3.39, 3.43
Due Friday, Sept. 9 at lecture:
#2.23
[Acceleration & the Human Body]
#2.82
[Model Rocket,
In (a): Graph a
y
& v
y
]
#2.88
[Free Fall with Sound]
#1.47 & #1.51
[Vector Components]
#3.81
[Relative Velocity/Reference Frames]
For both parts, (a) and (b), please include
carefully drawn and labeled
velocity vector diagrams
showing how the airplane's velocity
relative to the ground is related to its velocity relative to the air.
#3.93
[Relative Velocity/Reference Frames]
HINTS:
Start by working part (a) in the
reference frame of the river.
For part (b), switch to the reference frame of the ground.
1.
[Velocity & Acceleration Vectors]
Two carts roll towards each other on a level table.
The vectors represent the velocities of the carts before and after they collide.
AB
Before
After
(a)
Draw and label a vector for each cart to represent the
change in velocity
from before to
after the collision.