Sam Faulkner
PHY 203-A
PHY 203 Homework #2
Ch. 3: # 33, 37
Ch. 4: # 27, 83, 91
3.33) For the vectors in Fig. 3-32, with a=4 ,b=3, and c=5 , what are:
a-b) the magnitude and direction of a b
m=ab sin =( 4 ) (3 ) sin 90 =12 ; d =+ z
c-d) the magnitude and d
Sam Faulkner
PHY 203-A
PHY 203 Homework #8
Ch. 10: # 9, 37, 51 and Ch. 11: #11, 53, 61
9) A stone is dropped at t = 0. A second stone, with twice the mass of the first, is dropped from
the same point at t = 100 ms.
a) How far below the release point is th
Sam Faulkner
PHY 203-A
PHY 203 Homework #9
Ch. 12: #3, 21, 23, 43 and Ch. 13: #3 and 11
3) A uniform sphere of mass m=0.85
kg and radius r=4.2 cm is held in place by a
massless rope attached to a frictionless wall a distance L=8.0 cm above the center of t
Sam Faulkner
PHY 203-A
PHY 203 Homework #5
Ch. 9: #5, 19, 27, 51, 61, 79
5) What arefor the uniform plate if
L=5.0 cm?
a) the x coordinate
b) the y coordinate
The entire plate can be divided into 3 different pieces;
P1=( 4 L+ 3 L , 2 L ) =( 35 cm, 10 cm )
Sam Faulkner
PHY 203-A
PHY 203 Homework #4
Ch. 7 #11, 13, 19, 23, 41
11) A 12.0 N force with a fixed orientation does work on a particle as the particle moves through
^
^
^
the three-dimensional displacement d=( 2.00 i4.00 j+3.00 k ) m .
K =W =
Fd =Fd c
Sam Faulkner
PHY 203-A
PHY 203 Homework #1
Ch.2: # 3, 15, 29
Ch. 3: # 3, 9, 15
2.3) An automobile travels on a straight road for 40 km at 30 km/hr. It then continues in the same
direction for another 40 km at 60 km/hr.
a) What is the average velocity of t
Sam Faulkner
PHY 203-A
PHY 203 Homework #4
Ch. 6: #15, 17, 45, 49, 61
15) The coefficient of static friction between Teflon and scrambled eggs is about 0.04. What is
the smallest angle from the horizontal that will cause the eggs to slide across the botto
Sam Faulkner
PHY 203-A
PHY 203 Homework #3
Ch. 5: 25, 31, 33, 35, 53
25) A sun yacht is a spacecraft with a large sail that is pushed by sunlight. Although such a
push is tiny in everyday circumstances, it can be large enough to send the spacecraft outwar
Sam Faulkner
PHY 203-A
PHY 203 Homework #10
Ch. 13: #35, 41, 85 and Ch. 14: #17, 31, 59
35) Let m = 0.020 kg and d = 0.600 m. The total initial gravitational potential energy is
4 G m2 2 G m2
U i=
d
2d
U is inversely proportional to r, so reducing by 1/3
Sam Faulkner
PHY 203-A
PHY 203 Homework #11
Ch. 15: #13, 31, 59 and Ch. 16: 9, 17
13a) The motion repeats every 0.5 s so the period must be T =0.500 s
1
1
13b) The frequency is the reciprocal of the period: f = T = 0.500 s =2.00 Hz
13c) The angular freque
Lab 1: Introduction to Motion
Pre-lab
1. Sketch the position-time graph of a girl walking steadily away from a motion
sensor.
12
10
8
Position (m)
6
4
2
0
0
2
4
6
8
10
12
Time (s)
2. If a position-time graph is a straight line, then what is the significan