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10 Pages

### Kaplunovsky - hw 01

Course: PHY 303K, Spring 2007
School: University of Texas
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Word Count: 2872

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01 homework Due: Jan 26 2007, 4:00 am cube. Question 1, chap 1, sect 5. part 1 of 3 5 points A solid aluminum cube has sides each of length L . A second cube of the same material has sides three times the length of the first cube, i.e., 3 L . Compared to the first cube, the density of the second cube is 1. four times as much as the first cube. 2. the same as the first cube. correct 3. twenty-four times as much...

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University of Texas - PHY - 303K
homework 02 Due: Jan 31 2007, 4:00 pm Question 1, chap 2, sect 3. part 1 of 4 5 points The position versus time for a certain object moving along the x-axis is shown. The object's initial position is -3 m. 6 position (m) 4 2 0 -2 -4 0 1 2 3 4 5 tim
University of Texas - PHY - 303K
homework 03 Due: Feb 7 2007, 4:00 am Question 1, chap 2, sect 6. part 1 of 1 5 points An object is shot vertically upward into the air with a positive initial velocity. Which of the following correctly describes the velocity and acceleration of the
University of Texas - PHY - 303K
homework 04 Due: Feb 14 2007, 4:00 am Question 1, chap -1, sect -1. part 1 of 3 5 points A projectile is shot on level ground with a horizontal velocity of 12 m/s and a vertical velocity of 22 m/s . The acceleration of gravity is 9.8 m/s2 . y 22 m/
University of Texas - PHY - 303K
homework 05 Due: Feb 22 2007, 4:00 am Question 1, chap 5, sect 2. part 1 of 1 6 points An astronaut who weighs 554.9 N on the surface of the earth lifts off from planet Zuton in a space ship. The free-fall acceleration on Zuton is 5.8 m/s2 . At the
University of Texas - PHY - 303K
homework 06 Due: Mar 1 2007, 4:00 am Question 1, chap 6, sect 1. part 1 of 1 10 points A 930 kg car moves along a horizontal road at speed v0 = 22 m/s. The road is wet, so the static friction coefficient between the tires and the road is only s = 0
University of Texas - PHY - 303K
homework 07 Due: Mar 7 2007, 4:00 am Solving for the frictional force, f , Question 1, chap 7, sect 1. part 1 of 1 6 points Stan does 151 J of work lifting himself 0.1 m. The acceleration of gravity is 9.8 m/s2 . What is Stan's mass? Correct answer
University of Texas - PHY - 303K
homework 08 Due: Mar 22 2007, 4:00 am Explanation: Question 1, chap 7, sect 2. part 1 of 2 5 points The force required to stretch a Hooke's-law spring varies from 0 N to 22 N as we stretch the spring by moving one end 6.58 cm from its unstressed po
University of Texas - PHY - 303K
homework 09 Due: Mar 29 2007, 4:00 am Question 1, chap 10, sect 2. part 1 of 1 10 points Consider a 31 m high pyramide with a square base 48 m by 48 m. The pyramid is made of tightly-fitting stones of uniform density 2730 kg/m3 . Calculate the net
University of Texas - PHY - 303K
homework 10 Due: Apr 4 2007, 4:00 am 5 kg Question 1, chap 12, sect 5. part 1 of 1 6 points The rigid object shown is rotated about an axis perpendicular to the paper and through center point O. 68 kg 8m O 16 m 8m 34 kg 16 m 5 kg 8m 6m y1 5 kg
University of Texas - PHY - 303K
homework 11 Due: Apr 12 2007, 4:00 am Question 1, chap 13, sect 2. part 1 of 2 8 points A spool of wire of mass M = 5.4 kg and radius R = 0.64 m is unwound under a constant wire tension F = 4.3 N. Assume the spool is a uniform solid cylinder that r
University of Texas - PHY - 303K
homework 12 Due: Apr 19 2007, 4:00 am Question 1, chap 3, sect 4. part 1 of 3 5 points Consider the two vectors M = (a, b) = a ^+ i b ^ and N = (c, d) = c ^ + d ^ where, a and i c represent the x-displacement and b and d represent the y-displacem
University of Texas - PHY - 303K
homework 13 Due: Apr 25 2007, 4:00 am Question 1, chap 11, sect 3. part 1 of 3 5 points A clock balance wheel has a period of oscillation of 0.47 s. The wheel is constructed so that very nearly all of its 33 g of mass is concentrated around rim of
University of Texas - PHY - 303K
homework 14 Due: May 2 2007, 4:00 am 3 Question 1, chap 16, sect 3. part 1 of 1 8 points You are given two waves, a transverse wave that moves to the right f1 (x) and a transverse wave that moves to the left f2 (x), on a string. As the problem begi
University of Texas - PHY - 303K
practice 02 Due: Jan 29 2007, noon Question 1, chap 2, sect 5. part 1 of 1 10 points A sailboat is initially moving at a speed of 2 m/s. A strong wind blows up and accelerates the boat forward with a constant acceleration of 0.1 m/s2 for 10 s. What
University of Texas - PHY - 303K
practice 03 Due: Feb 5 2007, noon Question 1, chap 2, sect 7. part 1 of 3 5 points The position of a softball tossed vertically upward is described by the equation y = c1 t - c2 t2 , where y is in meters, t in seconds, c1 = 3.72 m/s, and c2 = 5.49
University of Texas - PHY - 303K
practice 04 Due: Feb 12 2007, noon Question 1, chap 4, sect 3. part 1 of 2 10 points A particle travels horizontally between two parallel walls separated by 18.4 m. It moves toward the opposing wall at a constant rate of 8.6 m/s. Also, it has an ac
University of Texas - PHY - 303K
practice 05 Due: Feb 20 2007, noon Question 1, chap 5, sect 2. part 1 of 1 5 points A 4100 kg helicopter accelerates upward at 1.8 m/s2 . The acceleration of gravity is 9.8 m/s2 . What lift force is exerted by the air on the propellers? Correct ans
University of Texas - PHY - 303K
practice 06 Due: Feb 26 2007, noon Question 1, chap 6, sect 1. part 1 of 1 5 points Consider three sheets of paper, all of the same size and weight. One sheet is un-folded, the other is folded in two, and the third is wadded into a ball. When you d
University of Texas - PHY - 303K
practice 07 Due: Mar 5 2007, noon Consequently, the friction force Question 1, chap -1, sect -1. part 1 of 5 5 points A 8.37 kg block is pushed 9.4 m up a vertical wall with constant speed by a constant force F applied at an angle of 58 with the ho
University of Texas - PHY - 303K
practice 08 Due: Mar 20 2007, noon Question 1, chap -1, sect -1. part 1 of 3 8 points Two blocks of respective masses m1 = 0.66 kg and m2 = 3.9 kg stand without motion on a frictionless horizontal table. A spring is compressed between the two block
University of Texas - PHY - 303K
practice 09 Due: Mar 27 2007, 1:00 pm Question 1, chap 11, sect 3. part 1 of 1 8 points A disc of mass m moves horizontally to the right with speed v on a table with negligible friction when it collides with a second disc of mass 7 m. The second di
University of Texas - PHY - 303K
practice 10 Due: Apr 2 2007, noon Question 1, chap 12, sect 5. part 1 of 1 10 points Calculate the moment of inertia for 4m L Axis L m L 2m L 3m L1perpendicular to the paper and through the center of mass? Correct answer: 0.624443 kg m2 (tolera
University of Texas - PHY - 303K
practice 11 Due: Apr 10 2007, noon Question 1, chap 13, sect 2. part 1 of 1 10 points A constant horizontal force of 120 N is applied to a lawn roller in the form of a uniform solid cylinder of radius 0.35 m and mass 13 kg. The acceleration of grav
University of Texas - PHY - 303K
practice 12 Due: Apr 17 2007, noon Therefore, using Question 1, chap 3, sect 4. part 1 of 2 7 points Given: Two vectors A = Ax ^ + Ay ^ i and B = Bx ^ + By ^ , i where Ax = -2, Ay = 1, Bx = 2, and By = 1. Find the z component of A B. Correct ans
University of Texas - PHY - 303K
practice 13 Due: Apr 23 2007, noon Question 1, chap 11, sect 3. part 1 of 1 5 points The equation of motion for a torsion pendulum (in small angle oscillation) is given by: : where = I = - , we find that = . I1Compare with the standard simpl
University of Texas - PHY - 303K
practice 14 Due: Apr 30 2007, noon 3 Question 1, chap 16, sect 3. part 1 of 1 8 points You are given two waves, a transverse wave that moves to the right f1 (x) and a transverse wave that moves to the left f2 (x), on a string. As the problem begins
University of Texas - PHY - 303K
practice 15 Due: May 8 2007, noon Question 1, chap 18, sect 3. part 1 of 1 5 points The pressure exerted on the ground by a man is greatest when: 1. He stands with both feet flat on the ground. 2. He stands on the toes of one foot. correct 3. The p
University of Texas - PHY - 303K
midterm 02 Due: Mar 7 2007, 10:00 pm Question 1, chap 5, sect 99. part 1 of 2 5 points A spherical mass rests upon two wedges, as seen in the figure below. The sphere and the wedges are at rest and stay at rest. There is no friction between the sph
University of Texas - PHY - 303K
midterm 03 Due: Apr 4 2007, 11:00 pm Question 1, chap 8, sect 1. part 1 of 1 10 points Consider a bungee cord of unstretched length L0 = 35 m. When the cord is stretched to L &gt; L0 it behaves like a spring and its tension follows the Hooke's law T =
University of Texas - PHY - 303K
midterm 04 Due: May 2 2007, 11:00 pm the torque Question 1, chap -1, sect -1. part 1 of 1 7 points A 3 m long rod of negligible weight is attached on one end to a ball joint which allows the rod to rotate in all directions. The free end of the rod
University of Texas - PHY - 303K
final 01 Due: May 10 2007, 11:00 pm Question 1, chap 1, sect 6. part 1 of 1 6 points Given 1 inch 2.54 cm and 1 foot 12 inches, how many square centimeters are there in 2.48 ft2 ? 1. 75.5904 cm2 2. 1.33333 cm2 3. 2304 cm2 correct 4. 0.0813648 cm2