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PHY 1331 Study Guide - Final Guide: André Tchaikowsky, Friction, Ideal Gas


Department
Physics
Course Code
PHY 1331
Professor
Andrzej Czajkowski
Study Guide
Final

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Andrzej Czajkowski
PHY1321/1331 exam
Page 1 out of 10
Principles of Physics I
PHY1321
PHY1331
Instructor: Dr. Andrzej Czajkowski
Final Exam
December 17 2014
Closed book exam
10 pages
33 questions of equal value
15 correct answers pass the test!
Duration: 3 hrs
RETURN ONLY THE SCANTRON SHEET!

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Andrzej Czajkowski
PHY1321/1331 exam
Page 2 out of 10
1 3kg mass rests on the flat surface while being acted on by the vertical 10N force
as. If g=9.9m/s2 the normal force acting on this body is equal to :
A 39.7N B 29.4N C 3.94N D 0N E 2.94 N
2 Two friends pull on the rope from opposite sides. If they are not moving with
respect to each other and one of them pulls with the force of 300N the tension in
the rope is___
a) 300N b) 0N c)600N d) it is impossible to answer
e) none of the above
3. If
A i j=12 16
 
and
B i j=+24 10
 
, what is the direction (with respect to the X axis) of the
vector
 
C A B=2
?
a) 49° b) 41° c) 90° d) +49° e) +221°
4 . At which point on the velocity-time graph is the
acceleration negative?
a. A b. B c. C
d. D e. E
5 In the elastic collision of two or more particles the following are conserved:
A mass B linear momentum C kinetic energy
D all of the above E none of the above
6 Three rods of length L and mass M each, and the
point-particle of mass M, are placed as shown
below. The coordinates of the centre of mass of
such system are:
A xCOM = L/4 yCOM = - L/4
B xCOM = -L/2 yCOM = L/2
C xCOM = -L/4 yCOM = -L/2
D xCOM = -L/4 yCOM = L/4
E none of the above
7. A cart of mass 2kg moving at speed +5m/s collides with another stationary cart of mass
3kg on air track (no friction), and the two stick together after the collision. What is
their velocity after colliding?
A 2 m/s B 1m/s C -1m/s D -2m/s E none of the above
3kg
A
B
CD
E
v
t
y
L/2
x
-L/2

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Andrzej Czajkowski
PHY1321/1331 exam
Page 3 out of 10
8. The specific heat at constant volume at 0°C of one mole of a diatomic gas is
a.
R
2
1
. b.
R
. c.
R
2
3
. d.2
R
. e.
R
2
5
.
9. A 0.3kg particle moves from the initial position r1(3i-5j -13k)m to r2(3i-5j +7k)m while
net force F(5i-7j +3k)N is acting on it. What is the work done by a force on the
particle as it moves from initial to final position?
A 2.9 J B 40J C 54J D 60J E 64 J
10 A reversible heat engine has a pV
diagram shown on the graph.
The net work performed in one cycle
is approximately:
a) 0 kJ b) 2.0kJ
c) 4.2kJ d) 5.5kJ
e) 10kJ
11. A steam engine absorbs 1500 J of heat and performs 500 J of mechanical work in each
cycle. The efficiency of the engine is
a.80% b.60% c.50% d.33% e.20%
12. A 5.0-kg object is suspended by a string from the ceiling of an elevator that is
accelerating downward at a rate of 2.6 m/s2. What is the tension in the string?
A) 49 N B) 36 N C) 62 N D) 13 N E) 52 N
13 . Some species of whales can dive to depths of 1 kilometer. What is the total pressure they
experience at this depth? (
r
sea = 1020 kg/m3 and 105 N/m2 = 1 ATM.)
A) 9 ATM B) 90 ATM C) 101 ATM D) 111 ATM E) 130 ATM
14 A hoop has a mass of 200g and a radius of 25cm (ICM = MR2 ). It rolls without
sliding along level ground at VCM = 5m/s. Its total kinetic energy is:
A) 2.5 J
B) 5 J
C) 10 J
D) 250 J
E) impossible to establish without extra information
3000
1000
2000
4000
V(m3)
1
P (Pa)
3
2
4
5
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