1. When work is done twice as quickly,
then the power expended is
a. half.
b. the same.
c. twice.
d. 4 times as much.
2. How much work is done on a
200-kg crate that is hoisted 2 m in
a time of 4 s?
a.
b.
c.
d.
400 J
1000 J
1600 J
4000 J
3. John lifts a b
Homework B solutions
Dr. Stolovy Phys 11
Ch. 3: 6, 8, 13, 14, 17, 23, 26, 27, 40
Ch. 3 problems # 4: find both the acceleration AND the distance
traveled in 10 s.
6.
Yes, velocity and acceleration need not be in the same direction. A car moving
north that
1) A scientific hypothesis can be
disproved with
a.
b.
c.
d.
.
one reproducible experiment.
disapproval of other scientists.
many tests by many scientists.
philosophical reasoning.
2) A person who says, thats only a
theory likely doesnt know that a
scient
Solutions
Homework A: Ch. 2 exercises: 1,4,6,10,11,14,18,22,24,28
1.The tendency of a rolling ball is to continue rollingin the absence of a force. The fact that it
slows down is due to the force of friction.
4. Galileo demolished the notion that a moving
1. When a farmer throws a 3-kg pumpkin
at a speed of 4 m/s onto a compost pile,
the pumpkins momentum just before
hitting the pile is
a.
b.
c.
d.
0 kgm/s.
5 kgm/s.
7 kgm/s.
12 kgm/s.
2. Compared with the momentum of a
200-lb man running 10 mi/h, the
momen
Homework C solutions
Dr. Stolovy Phys 11
Ch. 4: exercises:
1, 4, 5, 9, 14, 18, 21, 31, 38, 44
Problem #6
Ch. 4
1.Yes, as illustrated by a ball thrown vertically into the air. Its velocity is initially up,
and finally down, all the while accelerating at a
INSTRUCTOR: DR. SUSAN STOLOVY
PHYSICS 11 SYLLABUS FOR SPRING 2014, EL CAMINO COLLEGE
Email: sstolovy@elcamino.edu
Office: Physics 104D
Phone: 310-660-3593 x 3233
Section 1610: M 1:00-4:35pm, Phys 101 (does not meet Jan. 20, Feb. 17, and
March 17)
Welcome
Quiz E
Chapter 8
Rotational Motion
1. The rotational inertia of an object is
greater when most of the mass is
located
a. near the center.
b. away from the rotational axis.
c. on the rotational axis.
d. off-center.
2. Which of these will roll down an
incli
Chapter 9
Gravity
1. Legend tells us that Newton realized
that the idea of an apple in free fall
applies to
a. all apples.
b. the Moon.
c. Both of these.
d. Neither of these.
2. The Moon falls toward Earth in the
sense that it falls
a. with an acceleratio
Quiz B
Chapter 3: Linear Motion
1.
a.
b.
c.
d.
A glance at your speedometer will
tell you your
average speed.
instantaneous speed.
instantaneous velocity.
acceleration.
2.
You hike a distance of 1 km in 30
minutes. Your average speed is
a. 0.5 km/h.
b. 1