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UMass - Assessing-to-Learn (Homework)

James Finch

Physics - College, section 1, Fall 2019

Instructor: Dr. Friendly

Current Score : 8 / 8

Due : Monday, January 28, 2030 00:00 EST

Last Saved : n/a Saving...  ()

Question
Points
1 2 3 4 5 6 7 8
1/1 1/1 1/1 1/1 1/1 1/1 1/1 1/1
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8/8 (100.0%)
  • Instructions

    Conceptual Clicker Questions – Assessing-to-Learn (A2L) is a series of carefully crafted questions that focus on the most important and challenging concepts in physics. Developed by the University of Massachusetts Physics Education Research Group, and extensively class-tested at many schools nationwide, the A2L question collection allows instructors to pinpoint exactly where their students are facing challenges in logic. From that knowledge, you can customize your course and your lectures to best address key misconceptions before they become a barrier to student understanding.

    Originally designed and used as clicker questions using Student Response System technology, the A2L questions are also ideal as pre-lecture and post-lecture assignments, as well as conceptual questions to integrate into any standard assignment or quiz.

    Click here for a list of all of the questions coded in WebAssign. This demo assignment allows many submissions.

Assignment Submission

For this assignment, you submit answers by question parts. The number of submissions remaining for each question part only changes if you submit or change the answer.

Assignment Scoring

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1. 1/1 points  |  Previous Answers UMassA2L1 1.P.006. My Notes
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A person throws a ball straight up in the air. The ball rises to a maximum height and then falls back down so that the person catches it. Consider the ball while it is in the air. Which of the following statements are true?
  1. Just after the ball leaves the person's hand the direction of the acceleration is up.
  2. The acceleration is zero when the ball reaches its maximum height.
  3. The acceleration is about 9.8 m/s2 (down) when the ball is falling.
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2. 1/1 points  |  Previous Answers UMassA2L1 4.P.004. My Notes
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A block of mass 2 kg is at rest on the surface of a wedge that makes an angle of 30° with the horizontal as shown. The coefficient of static friction is 0.64 and of kinetic friction is 0.42. Which figure below best represents the free-body diagram for the block?


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3. 1/1 points  |  Previous Answers UMassA2L1 4.P.007. My Notes
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A block of mass m sits at rest on a rough incline of angle θ. The coefficient of static friction is μ.

The friction force on the block is
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4. 1/1 points  |  Previous Answers UMassA2L1 4.P.009. My Notes
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A block slides along a frictionless surface and onto a slab with a rough surface. The plot on the right shows the velocity of the blue slab as a function of time. The slab has mass of 4 kg and the block has mass of 2 kg.

What is the friction force on the small block at t = 1 second?
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5. 1/1 points  |  Previous Answers UMassA2L1 5.P.012. My Notes
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Two masses, M > m, travel down the surfaces shown. Both surfaces are frictionless.

Which mass has the largest speed at the bottom?
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6. 1/1 points  |  Previous Answers UMassA2L1 13.P.010. My Notes
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A capacitor with capacitance C is connected to a battery until charged, then disconnected from the battery. A dielectric having constant κ is inserted in the capacitor.

What changes occur in the charge, potential and stored energy of the capacitor after the dielectric is inserted?
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7. 1/1 points  |  Previous Answers UMassA2L1 14.P.002. My Notes
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An ohmic conductor is carrying a current. The cross-sectional area of the wire changes from one end of the wire to the other.

Which of the following quantities vary along the wire?
  1. the resistivity
  2. the current
  3. the current density
  4. the electric field
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8. 1/1 points  |  Previous Answers UMassA2L1 18.P.001. My Notes
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An object is located 8 cm away from, and near the optical axis of, a converging lens having focal length 10 cm. The image of the object is
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