PHYSICS 160

There is a homework assignment due (almost) every class period!
If on paper, they should be turned in at the alphabetically-labelled box at the front of the classroom,        before class begins!

If on WebAssign, they are due at or before 1 AM of the night after class!
Note that due dates are given in Spanish.

No. XXIV: due on miercoles, 27 de marzo

1. There are no paper problems due this Wednesday.
2. There are 3 WebAssign problems, concerning the conservation of linear momentum.
   They are due Wednesday night, late, as usual.

No. XXV: due on viernes, 29 de marzo

1. There is one paper problem to be done. Please note the Hint given in the problem, which, basically, tells you where the "lost" energy has gone to. [Note that it will eventually be provided back to the system when the spring has decompressed; however, you are not asked about that.
   1. Chapter 10: Problem 33P.
2. There are 4 rather easy WebAssign Problems, due this night.

No. XXVI: due on lunes, 1 de abril (April)

1. As some of you will have a "re-scheduled" exam today, there are no paper problems to do. However, for those of you who are not involved in that, I list a few problems that are worth trying, for better understanding of collisions: They are NOT to be turned in.
   1. Chapter 10: Problem 38E, Problem 40P, Problem 42P, Problem 49E, and Problem 55P.
2. There are 3 WebAssign problems due this night, that begin to take us into Chapter 11.

No. XXVII: due on miercoles, 3 de abril

1. There are no paper problems due today.
2. There are 5 straightforward WebAssign problems, due this night.

No. XXVIII: due on viernes, 5 de abril

1. There is 1 paper problem due today, in class:
     Do note that the one listed here now has been changed, this Wednesday morning, from what was here previously.
   
   1. From the material from Chapter 11:
      A car starts from rest and moves around a circular track of radius 30.0 meters. Its speed increases at the constant rate of 0.500 m/s².
      1. What is the magnitude of its net linear acceleration 15 seconds after it started?
      2. What angle does this net acceleration vector make with the car's velocity at this time?
      
      Note that "net linear acceleration" means to find both the tangential acceleration and the radial acceleration, in m/s², and to then add them together, vectorially.
2. There are only 3 WebAssign problems assigned, all from Chapter 11, due this night.

The second Challenge problem, No. II, has now been assigned.

You may access it at this link. The due date is Wednesday, 17 April, but you may turn it in earlier if you like.

Solutions will be discussed here.

No. XXIX: due on lunes, 8 de abril

1. There are no paper problems due today.
2. There are 3 WebAssign problems and 2 WebAssign questions to do, for tonight, from Chapter 11.

No. XXX: due on miercoles, 10 de abril

1. There are 2 paper questions due today.
   1. Chapter 11: Questions 10 and 11.
2. There are 4 WebAssign problems due this night.
   

No. XXXI: due on viernes, 12 de abril

1. There is one paper problem for today, below:
   1. Chapter 11: Problem 66P.
      Please put some written explanation as to why you are doing what you are doing.
      Next, presume that the acceleration with which it falls is constant, and determine that acceleration. (Hint: since it is constant, and you have a relation for v and h, you may use the formulae in Ch. 2 to do this.)
      Also, please take the falling mass to have numerical value m = 1 kg, the sphere to have M = 0.5 kg and radius R = 0.3 meters, while the pulley should be taken as a solid disk of aluminum, with mass m_disk = 0.05 kg and radius r_disk = 0.05 meter. Then use this information to calculate the speed at which the mass is falling when it has fallen a distance of 0.5 meter, 1 meter, and 2 meters.
2. There are 3 WebAssign problems, concerning Chapter 11.

No. XXXII: due on lunes, 15 de abril

1. There is one paper problem due today.
   1. Chapter 12: Problem 7E.
2. There are 5 WebAssign problems assigned, from Chapters 11 and 12, due this night.

For solutions click right here

No. XXXIII: due on miercoles, 17 de abril

1. There are no paper problems due today.
2. There are 3 questions and 2 problems from WebAssign problems assigned, from Chapter 12, due this night.

For solutions click right here

No. XXXIV: due on viernes, 19 de abril

1. There is one paper problem due today, which concerns an important topic, namely conservation of angular momentum..
   1. Chapter 12: Problem 48P.
2. There are 3 relatively straightforward WebAssign problems due this night.
   

For solutions click right here

THIRD EXAM will be on Monday, 22 April

Coverage will be chapters 9, 10, 11, and 12 of the text.

Click here to view the Solutions