10.1.IDENTIFY: Use Eq. (10.2) to calculate the magnitude of the torque and use the right-hand rule illustrated in
Figure 10.4 in the textbook to calculate the torque direction.
(a) SET UP: Consider Figure 10.1a.
EXECUTE:
Figure 10.1a
This force tends to p
11.5.IDENTIFY: Apply to the ladder.
SET UP: Take the axis to be at point A. The free-body diagram for the ladder is given in Figure 11.5. The torque
due to F must balance the torque due to the weight of the ladder.
EXECUTE:
EVALUATE: The force required is
PHY101 section 8,9
HW chapter 8
8.3.
IDENTIFY and SET UP:
EXECUTE: (a) and
(b) and the result from part (a) gives The baseball has the greater magnitude of momentum.
(c) so gives so
The woman has greater kinetic energy.
8.15.IDENTIFY: The player imparts a
Suggested problems from chapter 14
14.4.IDENTIFY: The period is the time for one cycle and the amplitude is the maximum displacement from
equilibrium. Both these values can be read from the graph.
SET UP: The maximum x is 10.0 cm. The time for one cycle i
7.9.
PHY 101 sections 8, 9
HW chapter 7
IDENTIFY: The forces on the rock are gravity, the normal force and friction.
SET UP: Let at point B and let be upward. The work done by friction is negative; The free-body diagram
for the rock at point B is given in
PHYSICS 101.05
HW Chapter 9
9.2.IDENTIFY: since the angular velocity is constant.
SET UP:
EXECUTE: (a)
(b)
EVALUATE: In we must use the same angular measure (radians, degrees or revolutions) for both and
9.5.IDENTIFY and SET UP: Use Eq. (9.3) to calculate
PHY101
HW 3
3.4.IDENTIFY: Given the position vector of a squirrel, find its velocity components in general, and at a specific time find
its velocity components and the magnitude and direction of its position vector and velocity.
SET UP: vx = dx/dt and vy
PHY 101 section 8, 9
HW #2
2.3.IDENTIFY: Target variable is the time it takes to make the trip in heavy traffic. Use Eq. (2.2) that relates the average
velocity to the displacement and average time.
SET UP: so and
EXECUTE: Use the information given for no
Physics 101 section 8,9
HW #1
1.14.
1.28.
IDENTIFY: When numbers are multiplied or divided, the number of significant figures in the result can be no
greater than in the factor with the fewest significant figures. When we add or subtract numbers it is the
Additional problems from chapter 7
7.23.IDENTIFY: Only the spring does work and Eq. (7.11) applies. where F is the force the spring exerts on the mass.
SET UP: Let point 1 be the initial position of the mass against the compressed spring, so and Let point
College of Arts and Sciences
Department of Physics
General Physics I- PHY 101.08, 09
Third Examination
Thursday December 30, 2012
Dr. Nasser Hamdan
Name:
ID:
Question
1. There are 5 questions in the exam with
5 points bonus
2. Read each question carefully
College of Arts and Sciences
Department of Physics
General Physics I- PHY 101.08, 09
Second Examination
Thursday November 14, 2012
Dr. Nasser Hamdan
Name:
ID:
Question
1. There are 12 questions in the exam
2. Read each question carefully before
you start
College of Arts and Sciences
Department of Physics
General Physics I- PHY 101.08, 09
First Examination
Thursday October 11, 2012
Dr. Nasser Hamdan
Name:
ID:
Question
total
1
2
3
4
5
10
10
10
10
10
50
Total grade
1.
2.
3.
4.
5.
There are 5 questions and 6
= 3i 2 jand
A
B
B
A
= 4i 4 j;(b) = 2 i + 4 jand = 3i 4 j + 2 k;(c) = i 2 j + 2kand
B
= 3 j + 4 k.
1)Usingthedefinitionofthescalarproduct,findtheanglesbetween(a) A
2)AparticleissubjecttoaforceFxthatvarieswithpositionasintheFigureP7.13.Findtheworkd
PHYSICS 101.05
HW Chapter 6
6.29.IDENTIFY: Only friction does work.
SET UP: (car stops).
EXECUTE: (a) gives
(b) (i) so The minimum stopping distance would be halved. (ii) so The stopping distance would become 4
times as great. (iii) so The stopping distan
HW Chapter 4 and 5
4.2.IDENTIFY: We know the magnitudes and directions of three vectors and want to use them to find their components,
and then to use the components to find the magnitude and direction of the resultant vector.
SET UP: Let and The angles t
5.110.IDENTIFY: The block has acceleration directed to the left in the figure in the problem. Apply to the block.
SET UP: The block moves in a horizontal circle of radius Each string makes an angle with the vertical. so
The free-body diagram for the block