homework 24 HETTIGER, CHRISTOF Due: Mar 27 2008, 4:00 am Question 1, chap 13, sect 1. part 1 of 2 10 points Consider a circular wheel with a mass m, and a radius R. The moment of inertia about the center of the wheel is I = k m R2 , where k is a constant
homework 23 HETTIGER, CHRISTOF Due: Mar 25 2008, 4:00 am Question 1, chap 12, sect 2. part 1 of 1 10 points A large wheel is coupled to a wheel with half the diameter as shown.
1
r
2r
A wheel rotating with a constant angular acceleration turns through 19
patel (rmp932) oldhomework 01 Turner (58220) This print-out should have 14 questions. Multiple-choice questions may continue on the next column or page find all choices before answering. 001 10.0 points Suppose that you wish to find out how much gasoline
homework 35 HETTIGER, CHRISTOF Due: Apr 24 2008, 4:00 am Question 1, chap 16, sect 2. part 1 of 3 10 points Two waves in one string are described by the relationships y1 = A1 cos(k1 x - 1 t) where A1 = 4.3 cm, A2 = 1.4 cm, k1 = 7 cm-1 , k2 = 3 cm-1 , 1 =
homework 36 HETTIGER, CHRISTOF Due: Apr 26 2008, 4:00 am The sound level at L2 is Question 1, chap 17, sect 2. part 1 of 1 10 points An explosive charge is detonated at a height of several kilometers in the atmosphere. At a distance of 549 m from the expl
homework 37 HETTIGER, CHRISTOF Due: Apr 29 2008, 4:00 am Question 1, chap 18, sect 5. part 1 of 1 10 points A block of mass 8.6 kg is completely immersed in a liquid of density 1150 kg/m3 . The block is suspended by a thin wire which experiences a tension
patel (rmp932) homework 01 Turner (58220) This print-out should have 12 questions. Multiple-choice questions may continue on the next column or page find all choices before answering. 001 10.0 points A block of material has dimensions 3.1 cm by 8.3 cm by
homework 01 HETTIGER, CHRISTOF Due: Jan 21 2008, 4:00 am Question 1, chap 1, sect 5. part 1 of 1 10 points A block of material has dimensions 4.5 cm by 8 cm by 3.8 cm. Its mass is 634 g. What is the density? Correct answer: 4.6345 g/cm3 (tolerance 1 %). E
homework 02 HETTIGER, CHRISTOF Due: Jan 22 2008, 4:00 am Question 1, chap 1, sect 6. part 1 of 2 10 points This problem shows how dimensional analysis helps us check and sometimes even find a formula. A rope has a cross section A = 10 m2 and density = 160
homework 03 HETTIGER, CHRISTOF Due: Jan 24 2008, 4:00 am Question 1, chap 2, sect 2. part 1 of 1 10 points The graph below shows the velocity v as a function of time t for an object moving in a straight line. v t tQ tR tS tP 0 Which of the following graph
homework 04 HETTIGER, CHRISTOF Due: Jan 26 2008, 4:00 am Question 1, chap 2, sect 4. part 1 of 1 10 points A car is moving at constant speed on the freeway. The driver sees a patrol car at time t1 and rapidly slows down by around 10 miles per hour. After
homework 05 HETTIGER, CHRISTOF Due: Jan 28 2008, 4:00 am at t = 2.44 s , the acceleration is Question 1, chap 2, sect 4. part 1 of 2 10 points The velocity of a particle moving along the x axis varies in time according to the expression v(t) = ( - t2 ) wh
homework 06 HETTIGER, CHRISTOF Due: Jan 31 2008, 4:00 am
C B c N r W O
1
Question 1, chap 3, sect 1. part 1 of 1 10 points A quarterback takes the ball from the line of scrimmage, runs backward for 11 yards, then runs sideways parallel to the line of scri
homework 07 HETTIGER, CHRISTOF Due: Feb 3 2008, 4:00 am Thus Question 1, chap 3, sect 99. part 1 of 1 10 points A hunter wishes to cross a river that is 1.4 km wide and that flows with a speed of 5.2 km/h. The hunter uses a small powerboat that moves at a
homework 08 HETTIGER, CHRISTOF Due: Feb 5 2008, 4:00 am Question 1, chap 4, sect 4. part 1 of 3 10 points A ball is thrown and follows the parabolic path shown. Air friction is negligible. Point Q is the highest point on the path. Points P and R are the s
homework 09 HETTIGER, CHRISTOF Due: Feb 7 2008, 4:00 am Question 1, chap 4, sect 5. part 1 of 1 10 points A ball on the end of a string is whirled around in a horizontal circle of radius 0.274 m. The plane of the circle is 1.49 m above the ground. The str
homework 10 HETTIGER, CHRISTOF Due: Feb 9 2008, 4:00 am Question 1, chap 12, sect 2. part 1 of 1 10 points What angular acceleration is necessary to increase the angular speed of a fan blade from 8.6 rad/s to 16.0 rad/s in 5.6 s? Correct answer: 1.32143 r
homework 11 HETTIGER, CHRISTOF Due: Feb 12 2008, 4:00 am Question 1, chap 5, sect 2. part 1 of 2 10 points A book is at rest on an incline as shown above. A hand, in contact with the top of the book, produces a constant force Fhand vertically downward. Fh
homework 12 HETTIGER, CHRISTOF Due: Feb 18 2008, 4:00 am Question 1, chap 6, sect 1. part 1 of 1 10 points There is friction between the block and the table. The suspended 2 kg mass on the left is moving up, the 4 kg mass slides to the right on the table,
homework 13 HETTIGER, CHRISTOF Due: Feb 19 2008, 4:00 am Question 1, chap 6, sect 2. part 1 of 1 10 points A load of 63 N attached to a spring hanging vertically stretches the spring 5.2 cm. The spring is now placed horizontally on a table and stretched 1
homework 14 HETTIGER, CHRISTOF Due: Feb 21 2008, 4:00 am Question 1, chap 6, sect 99. part 1 of 1 10 points A car with mass 848 kg passes over a bump in a road that follows the arc of a circle of radius 39.8 m as shown in the figure. The acceleration of g
homework 15 HETTIGER, CHRISTOF Due: Feb 23 2008, 4:00 am Question 1, chap 7, sect 3. part 1 of 3 10 points A block of mass m is pushed a distance D up an inclined plane by a horizontal force F . The plane is inclined at an angle with respect to the horizo
homework 16 HETTIGER, CHRISTOF Due: Feb 26 2008, 4:00 am Question 1, chap 8, sect 1. part 1 of 1 10 points A 4.7 kg mass is attached to a light cord that passes over a massless, frictionless pulley. The other end of the cord is attached to a 3.3 kg mass.
homework 17 HETTIGER, CHRISTOF Due: Feb 28 2008, 4:00 am Question 1, chap 8, sect 2. part 1 of 1 10 points The two blocks are connected by a light string that passes over a frictionless pulley with a negligible mass. The 5 kg block lies on a rough horizon
homework 18 HETTIGER, CHRISTOF Due: Mar 1 2008, 4:00 am since vi = 0 m/s. Question 1, chap 8, sect 5. part 1 of 1 10 points A hot rod of mass 1600 kg, starting from rest reaches a speed of 110 m/s in only 17.2 s. What is the average output power? 1. 0.000
homework 19 HETTIGER, CHRISTOF Due: Mar 4 2008, 4:00 am Question 1, chap 8, sect 5. part 1 of 2 10 points A 1410 kg car starts from rest and accelerates uniformly to 11.4 m/s in 10.2 s . Assume that air resistance remains constant at 389 N during this tim
homework 20 HETTIGER, CHRISTOF Due: Mar 5 2008, 4:00 am Question 1, chap 9, sect 4. part 1 of 1 10 points Given: k= 4 2 , G Ms Since v = 2r T
1
G Ms 4 2 r2 = 2+ . 2 rT r Kepler's third law becomes 4 2 3+ T = r , G Ms
2
where Ms is the mass of the Sun. Sup
homework 21 HETTIGER, CHRISTOF Due: Mar 20 2008, 4:00 am Question 1, chap 10, sect 1. part 1 of 1 10 points What velocity must a car with a mass of 1250 kg have in order to have the same momentum as a 2270 kg pickup truck traveling at 28 m/s to the east?
homework 22 HETTIGER, CHRISTOF Due: Mar 22 2008, 4:00 am Question 1, chap 11, sect 2. part 1 of 1 0 points A 0.376 kg bead slides on a straight frictionless wire with a velocity of 4.08 cm/s to the right, as shown. The bead collides elastically with a lar
homework 25 HETTIGER, CHRISTOF Due: Mar 29 2008, 4:00 am 2F Question 1, chap 13, sect 1. part 1 of 1 10 points A rod can pivot at one end and is free to rotate without friction about a vertical axis, as shown. A force F is applied at the other end, at an