UNIVERSITY OF ALABAMA Department of Physics and Astronomy PH 125 / LeClair Spring 2009
Exam II: Solutions
1. A block of mass m is released from rest at a height d = 40 cm and slides down a frictionless ramp and onto a first plateau, which has length d and
PH 125 Quiz 3: Solution
rf
W=
F dr =
xf
1
1
2
2
W = Kf Ki = mvf mvi
2
2
Fx d x
xi
ri
1. The magnitude of the force on a spring as a function of its displacement from equilibrium
(x = 0) can be written F = kx, where k is the force constant" of the spring.
PH 125 / LeClair
Spring 2014
Problem Set 2
Daily problem due 24 Jan 2014
1. A car is traveling at a constant velocity of 35 m/s and passes a stopped police cruiser. Exactly
2.5 s after passing, the cruiser begins pursuit, with a constant acceleration of 2
PH 125 / LeClair
Spring 2014
Problem Set 1 Solutions
Daily problems due 13 Jan 2014
1. Here are two vectors:
a = 1.0 + 2.0
b = 3.0 + 4.0
Find the following quantities:
a) the magnitude of a
b) the angle of a relative to b
c) the magnitude and angle of a
Name & ID
University of Alabama
Department of Physics and Astronomy
PH 125 / LeClair
Spring 2014
Exam I Solutions
1. A stone is dropped into a river from a bridge 43.9 m above the water. Another stone is thrown vertically down
1.00 s after the rst is drop
Name & ID
University of Alabama
Department of Physics and Astronomy
PH 125 / LeClair
Spring 2014
Exam II Solution
1. For an isolated system, conservation of energy holds, and the total energy of the system may be written as
the sum of kinetic and potentia
Name & ID
University of Alabama
Department of Physics and Astronomy
PH 125 / LeClair
Spring 2014
Exam III Solutions
1. A wad of sticky clay with mass m and velocity vi is red at a solid cylinder of mass M and radius R as shown
below. The cylinder is initi
PH 125 / LeClair
Spring 2014
Problem Set 4
Daily problems due 3 Mar 2014
1. A bullet of mass m is red at velocity vi . It strikes a wooden block of mass M , resulting in a completely
inelastic collision in which the bullet ends up embedded in the block. A
PH 125 / LeClair
Spring 2014
Problem Set 3 Solutions
Daily problems due 14 Feb 2014
1. A luge and its rider, with a total mass of 85 kg, emerge from a downhill track onto a horizontal straight
track with an initial speed of 37 m/s. If a force slows them t
PH 125 / LeClair
Spring 2014
Problem Set 6 Solutions
1. An object of mass m is dropped from a height h above the surface of a planet of mass M and radius R.
Assume the planet has no atmosphere so that friction can be ignored.
(a) What is the speed of the
PH 125 / LeClair
Spring 2014
Problem Set 2
Daily problem due 24 Jan 2014
1. A car is traveling at a constant velocity of 35 m/s and passes a stopped police cruiser. Exactly
2.5 s after passing, the cruiser begins pursuit, with a constant acceleration of 2
Name & ID
PH125 Exam IV: Solutions
1. The space shuttle releases a 470 kg satellite while in an orbit 280 km above the surface of the
earth. A rocket engine on the satellite boosts it to a geosynchronous orbit. How much energy is
required for the orbit bo
PH 125 / LeClair
Spring 2014
Problem Set 5 Solutions
1. A bowler throws a bowling ball of radius R along a lane. The ball slides on the lane with initial speed vo
and initial angular speed o = 0. The coecient of kinetic friction between the ball and the l
Name & ID
University of Alabama
Department of Physics and Astronomy
PH 125 / LeClair
Spring 2014
Exam III Solutions
1. A wad of sticky clay with mass m and velocity vi is red at a solid cylinder of mass M and radius R as shown
below. The cylinder is initi
Name & ID
University of Alabama
Department of Physics and Astronomy
PH 125 / LeClair
Spring 2014
Exam II Solution
1. For an isolated system, conservation of energy holds, and the total energy of the system may be written as
the sum of kinetic and potentia
Name & ID
University of Alabama
Department of Physics and Astronomy
PH 125 / LeClair
Spring 2014
Exam I Solutions
1. A stone is dropped into a river from a bridge 43.9 m above the water. Another stone is thrown vertically down
1.00 s after the rst is drop
Name & ID
University of Alabama
Department of Physics and Astronomy
PH 125 / LeClair
February 11, 2014
Quiz 2
Instructions:
1. Answer both questions below. Both have equal weight.
2. Express your answer with the appropriate units and signicant digits
3. S
Name & ID
University of Alabama
Department of Physics and Astronomy
PH 125 / LeClair
13 Jan 2014
Quiz 1 Solution
1. The position x as a function of time t of a particle traveling along a straight line can be described
by the function
x(t) = 2.0 + 4.0t 4.9
UNIVERSITY OF ALABAMA
Department of Physics and Astronomy
PH 125 / LeClair
Spring 2009
Exam I: Solution
1. A pilot ies horizontally at 1300 km/h, at height h = 35 m above initially level ground. However, at time t = 0, the
pilot begins to y over ground sl
UNIVERSITY OF ALABAMA
Department of Physics and Astronomy
PH 125 / LeClair
Spring 2009
Exam II: Solutions
1. A block of mass m is released from rest at a height d = 40 cm and slides down a frictionless ramp and onto a rst
plateau, which has length d and w
Name & ID
PH125 Exam III Solutions
1. A block of mass m is connected to two springs of force constants k1 and k2 as shown below. The block
moves on a frictionless table after it is displaced from equilibrium and released. Determine the period of
simple ha
Name & ID
PH125 Final Exam
Instructions
1. Solve the required number of problems in each section below.
2. Indicate which problems you have attempted by lling in the adjacent box.
3. Show your work for full credit. Signicant partial credit will be given.
UNIVERSITY OF ALABAMA
Department of Physics and Astronomy
PH 125 / LeClair
13 Jan 2009
Quiz 1: Solution
1. The position x as a function of time t of a particle traveling along a straight line can be described by
the function
x(t) = 2.0 + 4.0t 4.9t2
with t
UNIVERSITY OF ALABAMA
Department of Physics and Astronomy
PH 125 / LeClair
January 15, 2009
Quiz 2: Solutions
You have two vectors:
a = 1 + 2 + 3 k
and
b = 3 + 6 + 9 k
1. Find the scalar product of the two vectors, a b
First, remember that the way we have
UNIVERSITY OF ALABAMA
Department of Physics and Astronomy
PH 125 / LeClair
January 20, 2009
Quiz 3: Solution
1. A projectile is launched on level ground with a velocity of vi = 3.00 + 4.00 . What is the launch
angle i , relative to the x axis?
The angle o
NAME & ID
UNIVERSITY OF ALABAMA
Department of Physics and Astronomy
PH 125 / LeClair
January 28, 2009
Quiz 4: Solution
Instructions:
1. Answer both questions below. Both have equal weight.
2. Express your answer with the appropriate units and signicant di
Name
PH 125 Quiz 5: Its not Work if you do it right
xf
rf
F dr =
W=
Fx dx
xi
ri
1
1
2
2
W = Kf Ki = mvf mvi
2
2
1. The magnitude of the force on a spring as a function of its displacement from equilibrium (x = 0) can
be written F = kx, where k is the forc
NAME & ID
UNIVERSITY OF ALABAMA
Department of Physics and Astronomy
PH 125 / LeClair
February 8, 2009
Quiz 6: Solutions
1. A block of mass m is connected to a spring with force constant k . If the spring is compressed by
an amount x from equilibrium and r
UNIVERSITY OF ALABAMA
Department of Physics and Astronomy
PH 125 / LeClair
February 18, 2009
Quiz 7 Solution
1
1. A particle of mass m = 2 kg experiences a spatially varying potential energy U (x) = 2 + x2 , where
x
x is in meters and U is in Joules. In o
PH 125 Quiz Solution
1. Two pulses move in opposite directions on a string and are identical in shape except that one has positive
displacements of the elements of the string and the other has negative displacements. At the moment that the two
pulses comp